diff --git a/common/src/main/java/cn/wildfirechat/proto/WFCMessage.java b/common/src/main/java/cn/wildfirechat/proto/WFCMessage.java
index 2b22b4bb..8152ca21 100644
--- a/common/src/main/java/cn/wildfirechat/proto/WFCMessage.java
+++ b/common/src/main/java/cn/wildfirechat/proto/WFCMessage.java
@@ -1621,6 +1621,26 @@ public final class WFCMessage {
      * <code>optional int32 searchable = 13;</code>
      */
     int getSearchable();
+
+    // optional int32 max_member_count = 14;
+    /**
+     * <code>optional int32 max_member_count = 14;</code>
+     */
+    boolean hasMaxMemberCount();
+    /**
+     * <code>optional int32 max_member_count = 14;</code>
+     */
+    int getMaxMemberCount();
+
+    // optional int32 history_message = 15;
+    /**
+     * <code>optional int32 history_message = 15;</code>
+     */
+    boolean hasHistoryMessage();
+    /**
+     * <code>optional int32 history_message = 15;</code>
+     */
+    int getHistoryMessage();
   }
   /**
    * Protobuf type {@code GroupInfo}
@@ -1738,6 +1758,16 @@ public final class WFCMessage {
               searchable_ = input.readInt32();
               break;
             }
+            case 112: {
+              bitField0_ |= 0x00002000;
+              maxMemberCount_ = input.readInt32();
+              break;
+            }
+            case 120: {
+              bitField0_ |= 0x00004000;
+              historyMessage_ = input.readInt32();
+              break;
+            }
           }
         }
       } catch (com.google.protobuf.InvalidProtocolBufferException e) {
@@ -2121,6 +2151,38 @@ public final class WFCMessage {
       return searchable_;
     }
 
+    // optional int32 max_member_count = 14;
+    public static final int MAX_MEMBER_COUNT_FIELD_NUMBER = 14;
+    private int maxMemberCount_;
+    /**
+     * <code>optional int32 max_member_count = 14;</code>
+     */
+    public boolean hasMaxMemberCount() {
+      return ((bitField0_ & 0x00002000) == 0x00002000);
+    }
+    /**
+     * <code>optional int32 max_member_count = 14;</code>
+     */
+    public int getMaxMemberCount() {
+      return maxMemberCount_;
+    }
+
+    // optional int32 history_message = 15;
+    public static final int HISTORY_MESSAGE_FIELD_NUMBER = 15;
+    private int historyMessage_;
+    /**
+     * <code>optional int32 history_message = 15;</code>
+     */
+    public boolean hasHistoryMessage() {
+      return ((bitField0_ & 0x00004000) == 0x00004000);
+    }
+    /**
+     * <code>optional int32 history_message = 15;</code>
+     */
+    public int getHistoryMessage() {
+      return historyMessage_;
+    }
+
     private void initFields() {
       targetId_ = "";
       name_ = "";
@@ -2135,6 +2197,8 @@ public final class WFCMessage {
       joinType_ = 0;
       privateChat_ = 0;
       searchable_ = 0;
+      maxMemberCount_ = 0;
+      historyMessage_ = 0;
     }
     private byte memoizedIsInitialized = -1;
     public final boolean isInitialized() {
@@ -2195,6 +2259,12 @@ public final class WFCMessage {
       if (((bitField0_ & 0x00001000) == 0x00001000)) {
         output.writeInt32(13, searchable_);
       }
+      if (((bitField0_ & 0x00002000) == 0x00002000)) {
+        output.writeInt32(14, maxMemberCount_);
+      }
+      if (((bitField0_ & 0x00004000) == 0x00004000)) {
+        output.writeInt32(15, historyMessage_);
+      }
       getUnknownFields().writeTo(output);
     }
 
@@ -2256,6 +2326,14 @@ public final class WFCMessage {
         size += com.google.protobuf.CodedOutputStream
           .computeInt32Size(13, searchable_);
       }
+      if (((bitField0_ & 0x00002000) == 0x00002000)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeInt32Size(14, maxMemberCount_);
+      }
+      if (((bitField0_ & 0x00004000) == 0x00004000)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeInt32Size(15, historyMessage_);
+      }
       size += getUnknownFields().getSerializedSize();
       memoizedSerializedSize = size;
       return size;
@@ -2398,6 +2476,10 @@ public final class WFCMessage {
         bitField0_ = (bitField0_ & ~0x00000800);
         searchable_ = 0;
         bitField0_ = (bitField0_ & ~0x00001000);
+        maxMemberCount_ = 0;
+        bitField0_ = (bitField0_ & ~0x00002000);
+        historyMessage_ = 0;
+        bitField0_ = (bitField0_ & ~0x00004000);
         return this;
       }
 
@@ -2478,6 +2560,14 @@ public final class WFCMessage {
           to_bitField0_ |= 0x00001000;
         }
         result.searchable_ = searchable_;
+        if (((from_bitField0_ & 0x00002000) == 0x00002000)) {
+          to_bitField0_ |= 0x00002000;
+        }
+        result.maxMemberCount_ = maxMemberCount_;
+        if (((from_bitField0_ & 0x00004000) == 0x00004000)) {
+          to_bitField0_ |= 0x00004000;
+        }
+        result.historyMessage_ = historyMessage_;
         result.bitField0_ = to_bitField0_;
         onBuilt();
         return result;
@@ -2543,6 +2633,12 @@ public final class WFCMessage {
         if (other.hasSearchable()) {
           setSearchable(other.getSearchable());
         }
+        if (other.hasMaxMemberCount()) {
+          setMaxMemberCount(other.getMaxMemberCount());
+        }
+        if (other.hasHistoryMessage()) {
+          setHistoryMessage(other.getHistoryMessage());
+        }
         this.mergeUnknownFields(other.getUnknownFields());
         return this;
       }
@@ -3212,6 +3308,72 @@ public final class WFCMessage {
         return this;
       }
 
+      // optional int32 max_member_count = 14;
+      private int maxMemberCount_ ;
+      /**
+       * <code>optional int32 max_member_count = 14;</code>
+       */
+      public boolean hasMaxMemberCount() {
+        return ((bitField0_ & 0x00002000) == 0x00002000);
+      }
+      /**
+       * <code>optional int32 max_member_count = 14;</code>
+       */
+      public int getMaxMemberCount() {
+        return maxMemberCount_;
+      }
+      /**
+       * <code>optional int32 max_member_count = 14;</code>
+       */
+      public Builder setMaxMemberCount(int value) {
+        bitField0_ |= 0x00002000;
+        maxMemberCount_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional int32 max_member_count = 14;</code>
+       */
+      public Builder clearMaxMemberCount() {
+        bitField0_ = (bitField0_ & ~0x00002000);
+        maxMemberCount_ = 0;
+        onChanged();
+        return this;
+      }
+
+      // optional int32 history_message = 15;
+      private int historyMessage_ ;
+      /**
+       * <code>optional int32 history_message = 15;</code>
+       */
+      public boolean hasHistoryMessage() {
+        return ((bitField0_ & 0x00004000) == 0x00004000);
+      }
+      /**
+       * <code>optional int32 history_message = 15;</code>
+       */
+      public int getHistoryMessage() {
+        return historyMessage_;
+      }
+      /**
+       * <code>optional int32 history_message = 15;</code>
+       */
+      public Builder setHistoryMessage(int value) {
+        bitField0_ |= 0x00004000;
+        historyMessage_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>optional int32 history_message = 15;</code>
+       */
+      public Builder clearHistoryMessage() {
+        bitField0_ = (bitField0_ & ~0x00004000);
+        historyMessage_ = 0;
+        onChanged();
+        return this;
+      }
+
       // @@protoc_insertion_point(builder_scope:GroupInfo)
     }
 
@@ -61843,166 +62005,167 @@ public final class WFCMessage {
       "dRequest\022\022\n\ntarget_uid\030\001 \002(\t\022\016\n\006reason\030\002" +
       " \002(\t\022\r\n\005extra\030\003 \001(\t\":\n\014Conversation\022\014\n\004t" +
       "ype\030\001 \002(\005\022\016\n\006target\030\002 \002(\t\022\014\n\004line\030\003 \002(\005\"" +
-      "\370\001\n\tGroupInfo\022\021\n\ttarget_id\030\001 \001(\t\022\014\n\004name" +
+      "\253\002\n\tGroupInfo\022\021\n\ttarget_id\030\001 \001(\t\022\014\n\004name" +
       "\030\002 \002(\t\022\020\n\010portrait\030\003 \001(\t\022\r\n\005owner\030\004 \001(\t\022" +
       "\014\n\004type\030\005 \002(\005\022\024\n\014member_count\030\006 \001(\005\022\r\n\005e" +
       "xtra\030\007 \001(\t\022\021\n\tupdate_dt\030\010 \001(\003\022\030\n\020member_" +
       "update_dt\030\t \001(\003\022\014\n\004mute\030\n \001(\005\022\021\n\tjoin_ty" +
       "pe\030\013 \001(\005\022\024\n\014private_chat\030\014 \001(\005\022\022\n\nsearch",
-      "able\030\r \001(\005\"r\n\013GroupMember\022\021\n\tmember_id\030\001" +
-      " \002(\t\022\r\n\005alias\030\002 \001(\t\022\014\n\004type\030\003 \002(\005\022\021\n\tupd" +
-      "ate_dt\030\004 \001(\003\022\021\n\tcreate_dt\030\005 \001(\003\022\r\n\005extra" +
-      "\030\006 \001(\t\"F\n\005Group\022\036\n\ngroup_info\030\001 \002(\0132\n.Gr" +
-      "oupInfo\022\035\n\007members\030\002 \003(\0132\014.GroupMember\"\304" +
-      "\001\n\013ChannelInfo\022\021\n\ttarget_id\030\001 \001(\t\022\014\n\004nam" +
-      "e\030\002 \002(\t\022\020\n\010portrait\030\003 \001(\t\022\r\n\005owner\030\004 \001(\t" +
-      "\022\016\n\006status\030\005 \001(\005\022\014\n\004desc\030\006 \001(\t\022\r\n\005extra\030" +
-      "\007 \001(\t\022\021\n\tupdate_dt\030\010 \001(\003\022\016\n\006secret\030\t \001(\t" +
-      "\022\020\n\010callback\030\n \001(\t\022\021\n\tautomatic\030\013 \001(\005\"D\n",
-      "\021ModifyChannelInfo\022\022\n\nchannel_id\030\001 \002(\t\022\014" +
-      "\n\004type\030\002 \002(\005\022\r\n\005value\030\003 \002(\t\"8\n\017TransferC" +
-      "hannel\022\022\n\nchannel_id\030\001 \002(\t\022\021\n\tnew_owner\030" +
-      "\002 \002(\t\"3\n\017PullChannelInfo\022\022\n\nchannel_id\030\001" +
-      " \002(\t\022\014\n\004head\030\002 \002(\003\"H\n\023PullChannelListene" +
-      "r\022\022\n\nchannel_id\030\001 \002(\t\022\016\n\006offset\030\002 \002(\005\022\r\n" +
-      "\005count\030\003 \002(\005\"R\n\031PullChannelListenerResul" +
-      "t\022\023\n\013total_count\030\001 \002(\005\022\016\n\006offset\030\002 \002(\005\022\020" +
-      "\n\010listener\030\003 \003(\t\"3\n\rListenChannel\022\022\n\ncha" +
-      "nnel_id\030\001 \002(\t\022\016\n\006listen\030\002 \002(\005\"E\n\023SearchC",
-      "hannelResult\022\035\n\007channel\030\001 \003(\0132\014.ChannelI" +
-      "nfo\022\017\n\007keyword\030\002 \002(\t\"\235\002\n\016MessageContent\022" +
-      "\014\n\004type\030\001 \002(\005\022\032\n\022searchable_content\030\002 \001(" +
-      "\t\022\024\n\014push_content\030\003 \001(\t\022\017\n\007content\030\004 \001(\t" +
-      "\022\014\n\004data\030\005 \001(\014\022\021\n\tmediaType\030\006 \001(\005\022\026\n\016rem" +
-      "oteMediaUrl\030\007 \001(\t\022\024\n\014persist_flag\030\010 \001(\005\022" +
-      "\027\n\017expire_duration\030\t \001(\005\022\026\n\016mentioned_ty" +
-      "pe\030\n \001(\005\022\030\n\020mentioned_target\030\013 \003(\t\022\r\n\005ex" +
-      "tra\030\014 \001(\t\022\021\n\tpush_data\030\r \001(\t\"\226\001\n\025AddGrou" +
-      "pMemberRequest\022\020\n\010group_id\030\001 \002(\t\022\"\n\014adde",
-      "d_member\030\002 \003(\0132\014.GroupMember\022\017\n\007to_line\030" +
-      "\003 \003(\005\022\'\n\016notify_content\030\004 \001(\0132\017.MessageC" +
-      "ontent\022\r\n\005extra\030\005 \001(\t\"{\n\022CreateGroupRequ" +
-      "est\022\025\n\005group\030\001 \002(\0132\006.Group\022\017\n\007to_line\030\002 " +
+      "able\030\r \001(\005\022\030\n\020max_member_count\030\016 \001(\005\022\027\n\017" +
+      "history_message\030\017 \001(\005\"r\n\013GroupMember\022\021\n\t" +
+      "member_id\030\001 \002(\t\022\r\n\005alias\030\002 \001(\t\022\014\n\004type\030\003" +
+      " \002(\005\022\021\n\tupdate_dt\030\004 \001(\003\022\021\n\tcreate_dt\030\005 \001" +
+      "(\003\022\r\n\005extra\030\006 \001(\t\"F\n\005Group\022\036\n\ngroup_info" +
+      "\030\001 \002(\0132\n.GroupInfo\022\035\n\007members\030\002 \003(\0132\014.Gr" +
+      "oupMember\"\304\001\n\013ChannelInfo\022\021\n\ttarget_id\030\001" +
+      " \001(\t\022\014\n\004name\030\002 \002(\t\022\020\n\010portrait\030\003 \001(\t\022\r\n\005" +
+      "owner\030\004 \001(\t\022\016\n\006status\030\005 \001(\005\022\014\n\004desc\030\006 \001(" +
+      "\t\022\r\n\005extra\030\007 \001(\t\022\021\n\tupdate_dt\030\010 \001(\003\022\016\n\006s",
+      "ecret\030\t \001(\t\022\020\n\010callback\030\n \001(\t\022\021\n\tautomat" +
+      "ic\030\013 \001(\005\"D\n\021ModifyChannelInfo\022\022\n\nchannel" +
+      "_id\030\001 \002(\t\022\014\n\004type\030\002 \002(\005\022\r\n\005value\030\003 \002(\t\"8" +
+      "\n\017TransferChannel\022\022\n\nchannel_id\030\001 \002(\t\022\021\n" +
+      "\tnew_owner\030\002 \002(\t\"3\n\017PullChannelInfo\022\022\n\nc" +
+      "hannel_id\030\001 \002(\t\022\014\n\004head\030\002 \002(\003\"H\n\023PullCha" +
+      "nnelListener\022\022\n\nchannel_id\030\001 \002(\t\022\016\n\006offs" +
+      "et\030\002 \002(\005\022\r\n\005count\030\003 \002(\005\"R\n\031PullChannelLi" +
+      "stenerResult\022\023\n\013total_count\030\001 \002(\005\022\016\n\006off" +
+      "set\030\002 \002(\005\022\020\n\010listener\030\003 \003(\t\"3\n\rListenCha",
+      "nnel\022\022\n\nchannel_id\030\001 \002(\t\022\016\n\006listen\030\002 \002(\005" +
+      "\"E\n\023SearchChannelResult\022\035\n\007channel\030\001 \003(\013" +
+      "2\014.ChannelInfo\022\017\n\007keyword\030\002 \002(\t\"\235\002\n\016Mess" +
+      "ageContent\022\014\n\004type\030\001 \002(\005\022\032\n\022searchable_c" +
+      "ontent\030\002 \001(\t\022\024\n\014push_content\030\003 \001(\t\022\017\n\007co" +
+      "ntent\030\004 \001(\t\022\014\n\004data\030\005 \001(\014\022\021\n\tmediaType\030\006" +
+      " \001(\005\022\026\n\016remoteMediaUrl\030\007 \001(\t\022\024\n\014persist_" +
+      "flag\030\010 \001(\005\022\027\n\017expire_duration\030\t \001(\005\022\026\n\016m" +
+      "entioned_type\030\n \001(\005\022\030\n\020mentioned_target\030" +
+      "\013 \003(\t\022\r\n\005extra\030\014 \001(\t\022\021\n\tpush_data\030\r \001(\t\"",
+      "\226\001\n\025AddGroupMemberRequest\022\020\n\010group_id\030\001 " +
+      "\002(\t\022\"\n\014added_member\030\002 \003(\0132\014.GroupMember\022" +
+      "\017\n\007to_line\030\003 \003(\005\022\'\n\016notify_content\030\004 \001(\013" +
+      "2\017.MessageContent\022\r\n\005extra\030\005 \001(\t\"{\n\022Crea" +
+      "teGroupRequest\022\025\n\005group\030\001 \002(\0132\006.Group\022\017\n" +
+      "\007to_line\030\002 \003(\005\022\'\n\016notify_content\030\003 \001(\0132\017" +
+      ".MessageContent\022\024\n\014member_extra\030\004 \001(\t\"a\n" +
+      "\023DismissGroupRequest\022\020\n\010group_id\030\001 \002(\t\022\017" +
+      "\n\007to_line\030\002 \003(\005\022\'\n\016notify_content\030\003 \001(\0132" +
+      "\017.MessageContent\"\245\001\n\rFriendRequest\022\020\n\010fr",
+      "om_uid\030\001 \001(\t\022\016\n\006to_uid\030\002 \002(\t\022\016\n\006reason\030\003" +
+      " \002(\t\022\016\n\006status\030\004 \001(\005\022\021\n\tupdate_dt\030\005 \001(\003\022" +
+      "\030\n\020from_read_status\030\006 \001(\010\022\026\n\016to_read_sta" +
+      "tus\030\007 \001(\010\022\r\n\005extra\030\010 \001(\t\"#\n\rGeneralResul" +
+      "t\022\022\n\nerror_code\030\001 \002(\005\"?\n\025GetUploadTokenR" +
+      "equest\022\022\n\nmedia_type\030\001 \002(\005\022\022\n\nmedia_path" +
+      "\030\002 \002(\t\"S\n\024GetUploadTokenResult\022\016\n\006domain" +
+      "\030\001 \002(\t\022\r\n\005token\030\002 \002(\t\022\016\n\006server\030\003 \002(\t\022\014\n" +
+      "\004port\030\004 \001(\005\"H\n\023HandleFriendRequest\022\022\n\nta" +
+      "rget_uid\030\001 \002(\t\022\016\n\006status\030\002 \002(\005\022\r\n\005extra\030",
+      "\003 \001(\t\"\023\n\005IDBuf\022\n\n\002id\030\001 \002(\t\"\027\n\tIDListBuf\022" +
+      "\n\n\002id\030\001 \003(\t\"\256\001\n\007Message\022#\n\014conversation\030" +
+      "\001 \002(\0132\r.Conversation\022\021\n\tfrom_user\030\002 \002(\t\022" +
+      " \n\007content\030\003 \002(\0132\017.MessageContent\022\022\n\nmes" +
+      "sage_id\030\004 \001(\003\022\030\n\020server_timestamp\030\005 \001(\003\022" +
+      "\017\n\007to_user\030\006 \001(\t\022\n\n\002to\030\007 \003(\t\"\353\001\n\004User\022\013\n" +
+      "\003uid\030\001 \002(\t\022\014\n\004name\030\002 \001(\t\022\024\n\014display_name" +
+      "\030\003 \001(\t\022\020\n\010portrait\030\004 \001(\t\022\016\n\006mobile\030\005 \001(\t" +
+      "\022\r\n\005email\030\006 \001(\t\022\017\n\007address\030\007 \001(\t\022\017\n\007comp" +
+      "any\030\010 \001(\t\022\r\n\005extra\030\t \001(\t\022\021\n\tupdate_dt\030\n ",
+      "\001(\003\022\016\n\006gender\030\013 \001(\005\022\016\n\006social\030\014 \001(\t\022\014\n\004t" +
+      "ype\030\r \001(\005\022\017\n\007deleted\030\016 \001(\005\"c\n\005Robot\022\013\n\003u" +
+      "id\030\001 \002(\t\022\r\n\005state\030\002 \002(\005\022\r\n\005owner\030\003 \001(\t\022\016" +
+      "\n\006secret\030\004 \001(\t\022\020\n\010callback\030\005 \001(\t\022\r\n\005extr" +
+      "a\030\006 \001(\t\"(\n\017GetRobotsResult\022\025\n\005entry\030\001 \003(" +
+      "\0132\006.Robot\"g\n\030UploadDeviceTokenRequest\022\020\n" +
+      "\010platform\030\001 \002(\005\022\020\n\010app_name\030\002 \002(\t\022\024\n\014dev" +
+      "ice_token\030\003 \002(\t\022\021\n\tpush_type\030\004 \002(\005\"\201\001\n\026M" +
+      "odifyGroupInfoRequest\022\020\n\010group_id\030\001 \002(\t\022" +
+      "\014\n\004type\030\002 \002(\005\022\r\n\005value\030\003 \002(\t\022\017\n\007to_line\030",
+      "\004 \003(\005\022\'\n\016notify_content\030\005 \001(\0132\017.MessageC" +
+      "ontent\"\203\001\n\026SetGroupManagerRequest\022\020\n\010gro" +
+      "up_id\030\001 \002(\t\022\014\n\004type\030\002 \002(\005\022\017\n\007user_id\030\003 \003" +
+      "(\t\022\017\n\007to_line\030\004 \003(\005\022\'\n\016notify_content\030\005 " +
+      "\001(\0132\017.MessageContent\"(\n\tInfoEntry\022\014\n\004typ" +
+      "e\030\001 \002(\005\022\r\n\005value\030\002 \002(\t\"0\n\023ModifyMyInfoRe" +
+      "quest\022\031\n\005entry\030\001 \003(\0132\n.InfoEntry\";\n\rNoti" +
+      "fyMessage\022\014\n\004type\030\001 \002(\005\022\014\n\004head\030\002 \002(\003\022\016\n" +
+      "\006target\030\003 \001(\t\"=\n\022PullMessageRequest\022\n\n\002i" +
+      "d\030\001 \002(\003\022\014\n\004type\030\002 \002(\005\022\r\n\005delay\030\003 \001(\003\"M\n\021",
+      "PullMessageResult\022\031\n\007message\030\001 \003(\0132\010.Mes" +
+      "sage\022\017\n\007current\030\002 \002(\003\022\014\n\004head\030\003 \002(\003\"/\n\023P" +
+      "ullGroupInfoResult\022\030\n\004info\030\001 \003(\0132\n.Group" +
+      "Info\"6\n\026PullGroupMemberRequest\022\016\n\006target" +
+      "\030\001 \002(\t\022\014\n\004head\030\002 \002(\003\"5\n\025PullGroupMemberR" +
+      "esult\022\034\n\006member\030\001 \003(\0132\014.GroupMember\"-\n\013U" +
+      "serRequest\022\013\n\003uid\030\001 \002(\t\022\021\n\tupdate_dt\030\002 \001" +
+      "(\003\"0\n\017PullUserRequest\022\035\n\007request\030\001 \003(\0132\014" +
+      ".UserRequest\"/\n\nUserResult\022\023\n\004user\030\001 \002(\013" +
+      "2\005.User\022\014\n\004code\030\002 \002(\005\"-\n\016PullUserResult\022",
+      "\033\n\006result\030\001 \003(\0132\013.UserResult\"^\n\020QuitGrou" +
+      "pRequest\022\020\n\010group_id\030\001 \002(\t\022\017\n\007to_line\030\002 " +
       "\003(\005\022\'\n\016notify_content\030\003 \001(\0132\017.MessageCon" +
-      "tent\022\024\n\014member_extra\030\004 \001(\t\"a\n\023DismissGro" +
-      "upRequest\022\020\n\010group_id\030\001 \002(\t\022\017\n\007to_line\030\002" +
-      " \003(\005\022\'\n\016notify_content\030\003 \001(\0132\017.MessageCo" +
-      "ntent\"\245\001\n\rFriendRequest\022\020\n\010from_uid\030\001 \001(" +
-      "\t\022\016\n\006to_uid\030\002 \002(\t\022\016\n\006reason\030\003 \002(\t\022\016\n\006sta",
-      "tus\030\004 \001(\005\022\021\n\tupdate_dt\030\005 \001(\003\022\030\n\020from_rea" +
-      "d_status\030\006 \001(\010\022\026\n\016to_read_status\030\007 \001(\010\022\r" +
-      "\n\005extra\030\010 \001(\t\"#\n\rGeneralResult\022\022\n\nerror_" +
-      "code\030\001 \002(\005\"?\n\025GetUploadTokenRequest\022\022\n\nm" +
-      "edia_type\030\001 \002(\005\022\022\n\nmedia_path\030\002 \002(\t\"S\n\024G" +
-      "etUploadTokenResult\022\016\n\006domain\030\001 \002(\t\022\r\n\005t" +
-      "oken\030\002 \002(\t\022\016\n\006server\030\003 \002(\t\022\014\n\004port\030\004 \001(\005" +
-      "\"H\n\023HandleFriendRequest\022\022\n\ntarget_uid\030\001 " +
-      "\002(\t\022\016\n\006status\030\002 \002(\005\022\r\n\005extra\030\003 \001(\t\"\023\n\005ID" +
-      "Buf\022\n\n\002id\030\001 \002(\t\"\027\n\tIDListBuf\022\n\n\002id\030\001 \003(\t",
-      "\"\256\001\n\007Message\022#\n\014conversation\030\001 \002(\0132\r.Con" +
-      "versation\022\021\n\tfrom_user\030\002 \002(\t\022 \n\007content\030" +
-      "\003 \002(\0132\017.MessageContent\022\022\n\nmessage_id\030\004 \001" +
-      "(\003\022\030\n\020server_timestamp\030\005 \001(\003\022\017\n\007to_user\030" +
-      "\006 \001(\t\022\n\n\002to\030\007 \003(\t\"\353\001\n\004User\022\013\n\003uid\030\001 \002(\t\022" +
-      "\014\n\004name\030\002 \001(\t\022\024\n\014display_name\030\003 \001(\t\022\020\n\010p" +
-      "ortrait\030\004 \001(\t\022\016\n\006mobile\030\005 \001(\t\022\r\n\005email\030\006" +
-      " \001(\t\022\017\n\007address\030\007 \001(\t\022\017\n\007company\030\010 \001(\t\022\r" +
-      "\n\005extra\030\t \001(\t\022\021\n\tupdate_dt\030\n \001(\003\022\016\n\006gend" +
-      "er\030\013 \001(\005\022\016\n\006social\030\014 \001(\t\022\014\n\004type\030\r \001(\005\022\017",
-      "\n\007deleted\030\016 \001(\005\"c\n\005Robot\022\013\n\003uid\030\001 \002(\t\022\r\n" +
-      "\005state\030\002 \002(\005\022\r\n\005owner\030\003 \001(\t\022\016\n\006secret\030\004 " +
-      "\001(\t\022\020\n\010callback\030\005 \001(\t\022\r\n\005extra\030\006 \001(\t\"(\n\017" +
-      "GetRobotsResult\022\025\n\005entry\030\001 \003(\0132\006.Robot\"g" +
-      "\n\030UploadDeviceTokenRequest\022\020\n\010platform\030\001" +
-      " \002(\005\022\020\n\010app_name\030\002 \002(\t\022\024\n\014device_token\030\003" +
-      " \002(\t\022\021\n\tpush_type\030\004 \002(\005\"\201\001\n\026ModifyGroupI" +
-      "nfoRequest\022\020\n\010group_id\030\001 \002(\t\022\014\n\004type\030\002 \002" +
-      "(\005\022\r\n\005value\030\003 \002(\t\022\017\n\007to_line\030\004 \003(\005\022\'\n\016no" +
-      "tify_content\030\005 \001(\0132\017.MessageContent\"\203\001\n\026",
-      "SetGroupManagerRequest\022\020\n\010group_id\030\001 \002(\t" +
-      "\022\014\n\004type\030\002 \002(\005\022\017\n\007user_id\030\003 \003(\t\022\017\n\007to_li" +
-      "ne\030\004 \003(\005\022\'\n\016notify_content\030\005 \001(\0132\017.Messa" +
-      "geContent\"(\n\tInfoEntry\022\014\n\004type\030\001 \002(\005\022\r\n\005" +
-      "value\030\002 \002(\t\"0\n\023ModifyMyInfoRequest\022\031\n\005en" +
-      "try\030\001 \003(\0132\n.InfoEntry\";\n\rNotifyMessage\022\014" +
-      "\n\004type\030\001 \002(\005\022\014\n\004head\030\002 \002(\003\022\016\n\006target\030\003 \001" +
-      "(\t\"=\n\022PullMessageRequest\022\n\n\002id\030\001 \002(\003\022\014\n\004" +
-      "type\030\002 \002(\005\022\r\n\005delay\030\003 \001(\003\"M\n\021PullMessage" +
-      "Result\022\031\n\007message\030\001 \003(\0132\010.Message\022\017\n\007cur",
-      "rent\030\002 \002(\003\022\014\n\004head\030\003 \002(\003\"/\n\023PullGroupInf" +
-      "oResult\022\030\n\004info\030\001 \003(\0132\n.GroupInfo\"6\n\026Pul" +
-      "lGroupMemberRequest\022\016\n\006target\030\001 \002(\t\022\014\n\004h" +
-      "ead\030\002 \002(\003\"5\n\025PullGroupMemberResult\022\034\n\006me" +
-      "mber\030\001 \003(\0132\014.GroupMember\"-\n\013UserRequest\022" +
-      "\013\n\003uid\030\001 \002(\t\022\021\n\tupdate_dt\030\002 \001(\003\"0\n\017PullU" +
-      "serRequest\022\035\n\007request\030\001 \003(\0132\014.UserReques" +
-      "t\"/\n\nUserResult\022\023\n\004user\030\001 \002(\0132\005.User\022\014\n\004" +
-      "code\030\002 \002(\005\"-\n\016PullUserResult\022\033\n\006result\030\001" +
-      " \003(\0132\013.UserResult\"^\n\020QuitGroupRequest\022\020\n",
-      "\010group_id\030\001 \002(\t\022\017\n\007to_line\030\002 \003(\005\022\'\n\016noti" +
-      "fy_content\030\003 \001(\0132\017.MessageContent\"~\n\030Rem" +
-      "oveGroupMemberRequest\022\020\n\010group_id\030\001 \002(\t\022" +
-      "\026\n\016removed_member\030\002 \003(\t\022\017\n\007to_line\030\003 \003(\005" +
-      "\022\'\n\016notify_content\030\004 \001(\0132\017.MessageConten" +
-      "t\"u\n\024TransferGroupRequest\022\020\n\010group_id\030\001 " +
-      "\002(\t\022\021\n\tnew_owner\030\002 \002(\t\022\017\n\007to_line\030\003 \003(\005\022" +
-      "\'\n\016notify_content\030\004 \001(\0132\017.MessageContent" +
-      "\"\206\001\n\026ModifyGroupMemberAlias\022\020\n\010group_id\030" +
-      "\001 \002(\t\022\r\n\005alias\030\002 \002(\t\022\017\n\007to_line\030\003 \003(\005\022\'\n",
-      "\016notify_content\030\004 \001(\0132\017.MessageContent\022\021" +
-      "\n\tmember_id\030\005 \001(\t\"\206\001\n\026ModifyGroupMemberE" +
-      "xtra\022\020\n\010group_id\030\001 \002(\t\022\017\n\007to_line\030\002 \003(\005\022" +
-      "\'\n\016notify_content\030\003 \001(\0132\017.MessageContent" +
-      "\022\r\n\005extra\030\004 \001(\t\022\021\n\tmember_id\030\005 \001(\t\"P\n\020Us" +
-      "erSettingEntry\022\r\n\005scope\030\001 \002(\005\022\013\n\003key\030\002 \002" +
-      "(\t\022\r\n\005value\030\003 \002(\t\022\021\n\tupdate_dt\030\004 \002(\003\"A\n\024" +
-      "ModifyUserSettingReq\022\r\n\005scope\030\001 \002(\005\022\013\n\003k" +
-      "ey\030\002 \002(\t\022\r\n\005value\030\003 \002(\t\"\032\n\007Version\022\017\n\007ve" +
-      "rsion\030\001 \002(\003\"8\n\024GetUserSettingResult\022 \n\005e",
-      "ntry\030\001 \003(\0132\021.UserSettingEntry\"f\n\006Friend\022" +
-      "\013\n\003uid\030\001 \002(\t\022\r\n\005state\030\002 \002(\005\022\021\n\tupdate_dt" +
-      "\030\003 \002(\003\022\r\n\005alias\030\004 \001(\t\022\017\n\007blacked\030\005 \001(\005\022\r" +
-      "\n\005extra\030\006 \001(\t\"*\n\020GetFriendsResult\022\026\n\005ent" +
-      "ry\030\001 \003(\0132\007.Friend\"7\n\026GetFriendRequestRes" +
-      "ult\022\035\n\005entry\030\001 \003(\0132\016.FriendRequest\"\243\001\n\021C" +
-      "onnectAckPayload\022\020\n\010msg_head\030\001 \001(\003\022\023\n\013fr" +
-      "iend_head\030\002 \001(\003\022\026\n\016friend_rq_head\030\003 \001(\003\022" +
-      "\024\n\014setting_head\030\004 \001(\003\022\021\n\tnode_addr\030\005 \001(\t" +
-      "\022\021\n\tnode_port\030\006 \001(\005\022\023\n\013server_time\030\007 \001(\003",
-      "\"P\n\rIMHttpWrapper\022\r\n\005token\030\001 \002(\t\022\021\n\tclie" +
-      "nt_id\030\002 \002(\t\022\017\n\007request\030\003 \002(\t\022\014\n\004data\030\004 \001" +
-      "(\014\"A\n\021SearchUserRequest\022\017\n\007keyword\030\001 \002(\t" +
-      "\022\r\n\005fuzzy\030\002 \001(\005\022\014\n\004page\030\003 \001(\005\"(\n\020SearchU" +
-      "serResult\022\024\n\005entry\030\001 \003(\0132\005.User\"@\n\026GetCh" +
-      "atroomInfoRequest\022\023\n\013chatroom_id\030\001 \002(\t\022\021" +
-      "\n\tupdate_dt\030\002 \001(\003\"\227\001\n\014ChatroomInfo\022\r\n\005ti" +
-      "tle\030\001 \002(\t\022\014\n\004desc\030\002 \001(\t\022\020\n\010portrait\030\003 \001(" +
-      "\t\022\024\n\014member_count\030\004 \001(\005\022\021\n\tcreate_dt\030\005 \001" +
-      "(\003\022\021\n\tupdate_dt\030\006 \001(\003\022\r\n\005extra\030\007 \001(\t\022\r\n\005",
-      "state\030\010 \001(\005\"F\n\034GetChatroomMemberInfoRequ" +
-      "est\022\023\n\013chatroom_id\030\001 \002(\t\022\021\n\tmax_count\030\002 " +
-      "\001(\005\";\n\022ChatroomMemberInfo\022\024\n\014member_coun" +
-      "t\030\001 \001(\005\022\017\n\007members\030\002 \003(\t\"\026\n\010INT64Buf\022\n\n\002" +
-      "id\030\001 \002(\003\"4\n\023NotifyRecallMessage\022\n\n\002id\030\001 " +
-      "\002(\003\022\021\n\tfrom_user\030\002 \002(\t\"/\n\020BlackUserReque" +
-      "st\022\013\n\003uid\030\001 \002(\t\022\016\n\006status\030\002 \002(\005\"\323\001\n\014Rout" +
-      "eRequest\022\013\n\003app\030\001 \001(\t\022\020\n\010platform\030\002 \001(\005\022" +
-      "\021\n\tpush_type\030\003 \001(\005\022\023\n\013device_name\030\004 \001(\t\022" +
-      "\026\n\016device_version\030\005 \001(\t\022\022\n\nphone_name\030\006 ",
-      "\001(\t\022\020\n\010language\030\007 \001(\t\022\024\n\014carrier_name\030\010 " +
-      "\001(\t\022\023\n\013app_version\030\t \001(\t\022\023\n\013sdk_version\030" +
-      "\n \001(\t\"D\n\rRouteResponse\022\014\n\004host\030\001 \002(\t\022\021\n\t" +
-      "long_port\030\002 \002(\005\022\022\n\nshort_port\030\003 \002(\005\"G\n\017G" +
-      "etTokenRequest\022\017\n\007user_id\030\001 \002(\t\022\021\n\tclien" +
-      "t_id\030\002 \002(\t\022\020\n\010platform\030\003 \001(\005\"\\\n\022LoadRemo" +
-      "teMessages\022#\n\014conversation\030\001 \002(\0132\r.Conve" +
-      "rsation\022\022\n\nbefore_uid\030\002 \002(\003\022\r\n\005count\030\003 \002" +
-      "(\005\"a\n\020MultiCastMessage\022\021\n\tfrom_user\030\001 \002(" +
-      "\t\022 \n\007content\030\002 \002(\0132\017.MessageContent\022\n\n\002t",
-      "o\030\003 \003(\t\022\014\n\004line\030\004 \002(\005\"E\n\035RecallMultiCast" +
-      "MessageRequest\022\022\n\nmessage_id\030\001 \002(\003\022\020\n\010re" +
-      "ceiver\030\002 \003(\tB#\n\025cn.wildfirechat.protoB\nW" +
-      "FCMessage"
+      "tent\"~\n\030RemoveGroupMemberRequest\022\020\n\010grou" +
+      "p_id\030\001 \002(\t\022\026\n\016removed_member\030\002 \003(\t\022\017\n\007to" +
+      "_line\030\003 \003(\005\022\'\n\016notify_content\030\004 \001(\0132\017.Me" +
+      "ssageContent\"u\n\024TransferGroupRequest\022\020\n\010" +
+      "group_id\030\001 \002(\t\022\021\n\tnew_owner\030\002 \002(\t\022\017\n\007to_" +
+      "line\030\003 \003(\005\022\'\n\016notify_content\030\004 \001(\0132\017.Mes" +
+      "sageContent\"\206\001\n\026ModifyGroupMemberAlias\022\020",
+      "\n\010group_id\030\001 \002(\t\022\r\n\005alias\030\002 \002(\t\022\017\n\007to_li" +
+      "ne\030\003 \003(\005\022\'\n\016notify_content\030\004 \001(\0132\017.Messa" +
+      "geContent\022\021\n\tmember_id\030\005 \001(\t\"\206\001\n\026ModifyG" +
+      "roupMemberExtra\022\020\n\010group_id\030\001 \002(\t\022\017\n\007to_" +
+      "line\030\002 \003(\005\022\'\n\016notify_content\030\003 \001(\0132\017.Mes" +
+      "sageContent\022\r\n\005extra\030\004 \001(\t\022\021\n\tmember_id\030" +
+      "\005 \001(\t\"P\n\020UserSettingEntry\022\r\n\005scope\030\001 \002(\005" +
+      "\022\013\n\003key\030\002 \002(\t\022\r\n\005value\030\003 \002(\t\022\021\n\tupdate_d" +
+      "t\030\004 \002(\003\"A\n\024ModifyUserSettingReq\022\r\n\005scope" +
+      "\030\001 \002(\005\022\013\n\003key\030\002 \002(\t\022\r\n\005value\030\003 \002(\t\"\032\n\007Ve",
+      "rsion\022\017\n\007version\030\001 \002(\003\"8\n\024GetUserSetting" +
+      "Result\022 \n\005entry\030\001 \003(\0132\021.UserSettingEntry" +
+      "\"f\n\006Friend\022\013\n\003uid\030\001 \002(\t\022\r\n\005state\030\002 \002(\005\022\021" +
+      "\n\tupdate_dt\030\003 \002(\003\022\r\n\005alias\030\004 \001(\t\022\017\n\007blac" +
+      "ked\030\005 \001(\005\022\r\n\005extra\030\006 \001(\t\"*\n\020GetFriendsRe" +
+      "sult\022\026\n\005entry\030\001 \003(\0132\007.Friend\"7\n\026GetFrien" +
+      "dRequestResult\022\035\n\005entry\030\001 \003(\0132\016.FriendRe" +
+      "quest\"\243\001\n\021ConnectAckPayload\022\020\n\010msg_head\030" +
+      "\001 \001(\003\022\023\n\013friend_head\030\002 \001(\003\022\026\n\016friend_rq_" +
+      "head\030\003 \001(\003\022\024\n\014setting_head\030\004 \001(\003\022\021\n\tnode",
+      "_addr\030\005 \001(\t\022\021\n\tnode_port\030\006 \001(\005\022\023\n\013server" +
+      "_time\030\007 \001(\003\"P\n\rIMHttpWrapper\022\r\n\005token\030\001 " +
+      "\002(\t\022\021\n\tclient_id\030\002 \002(\t\022\017\n\007request\030\003 \002(\t\022" +
+      "\014\n\004data\030\004 \001(\014\"A\n\021SearchUserRequest\022\017\n\007ke" +
+      "yword\030\001 \002(\t\022\r\n\005fuzzy\030\002 \001(\005\022\014\n\004page\030\003 \001(\005" +
+      "\"(\n\020SearchUserResult\022\024\n\005entry\030\001 \003(\0132\005.Us" +
+      "er\"@\n\026GetChatroomInfoRequest\022\023\n\013chatroom" +
+      "_id\030\001 \002(\t\022\021\n\tupdate_dt\030\002 \001(\003\"\227\001\n\014Chatroo" +
+      "mInfo\022\r\n\005title\030\001 \002(\t\022\014\n\004desc\030\002 \001(\t\022\020\n\010po" +
+      "rtrait\030\003 \001(\t\022\024\n\014member_count\030\004 \001(\005\022\021\n\tcr",
+      "eate_dt\030\005 \001(\003\022\021\n\tupdate_dt\030\006 \001(\003\022\r\n\005extr" +
+      "a\030\007 \001(\t\022\r\n\005state\030\010 \001(\005\"F\n\034GetChatroomMem" +
+      "berInfoRequest\022\023\n\013chatroom_id\030\001 \002(\t\022\021\n\tm" +
+      "ax_count\030\002 \001(\005\";\n\022ChatroomMemberInfo\022\024\n\014" +
+      "member_count\030\001 \001(\005\022\017\n\007members\030\002 \003(\t\"\026\n\010I" +
+      "NT64Buf\022\n\n\002id\030\001 \002(\003\"4\n\023NotifyRecallMessa" +
+      "ge\022\n\n\002id\030\001 \002(\003\022\021\n\tfrom_user\030\002 \002(\t\"/\n\020Bla" +
+      "ckUserRequest\022\013\n\003uid\030\001 \002(\t\022\016\n\006status\030\002 \002" +
+      "(\005\"\323\001\n\014RouteRequest\022\013\n\003app\030\001 \001(\t\022\020\n\010plat" +
+      "form\030\002 \001(\005\022\021\n\tpush_type\030\003 \001(\005\022\023\n\013device_",
+      "name\030\004 \001(\t\022\026\n\016device_version\030\005 \001(\t\022\022\n\nph" +
+      "one_name\030\006 \001(\t\022\020\n\010language\030\007 \001(\t\022\024\n\014carr" +
+      "ier_name\030\010 \001(\t\022\023\n\013app_version\030\t \001(\t\022\023\n\013s" +
+      "dk_version\030\n \001(\t\"D\n\rRouteResponse\022\014\n\004hos" +
+      "t\030\001 \002(\t\022\021\n\tlong_port\030\002 \002(\005\022\022\n\nshort_port" +
+      "\030\003 \002(\005\"G\n\017GetTokenRequest\022\017\n\007user_id\030\001 \002" +
+      "(\t\022\021\n\tclient_id\030\002 \002(\t\022\020\n\010platform\030\003 \001(\005\"" +
+      "\\\n\022LoadRemoteMessages\022#\n\014conversation\030\001 " +
+      "\002(\0132\r.Conversation\022\022\n\nbefore_uid\030\002 \002(\003\022\r" +
+      "\n\005count\030\003 \002(\005\"a\n\020MultiCastMessage\022\021\n\tfro",
+      "m_user\030\001 \002(\t\022 \n\007content\030\002 \002(\0132\017.MessageC" +
+      "ontent\022\n\n\002to\030\003 \003(\t\022\014\n\004line\030\004 \002(\005\"E\n\035Reca" +
+      "llMultiCastMessageRequest\022\022\n\nmessage_id\030" +
+      "\001 \002(\003\022\020\n\010receiver\030\002 \003(\tB#\n\025cn.wildfirech" +
+      "at.protoB\nWFCMessage"
     };
     com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner assigner =
       new com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner() {
@@ -62026,7 +62189,7 @@ public final class WFCMessage {
           internal_static_GroupInfo_fieldAccessorTable = new
             com.google.protobuf.GeneratedMessage.FieldAccessorTable(
               internal_static_GroupInfo_descriptor,
-              new java.lang.String[] { "TargetId", "Name", "Portrait", "Owner", "Type", "MemberCount", "Extra", "UpdateDt", "MemberUpdateDt", "Mute", "JoinType", "PrivateChat", "Searchable", });
+              new java.lang.String[] { "TargetId", "Name", "Portrait", "Owner", "Type", "MemberCount", "Extra", "UpdateDt", "MemberUpdateDt", "Mute", "JoinType", "PrivateChat", "Searchable", "MaxMemberCount", "HistoryMessage", });
           internal_static_GroupMember_descriptor =
             getDescriptor().getMessageTypes().get(3);
           internal_static_GroupMember_fieldAccessorTable = new
diff --git a/sdk/src/main/java/cn/wildfirechat/sdk/utilities/AdminHttpUtils.java b/sdk/src/main/java/cn/wildfirechat/sdk/utilities/AdminHttpUtils.java
index 3de330e2..f200a26d 100644
--- a/sdk/src/main/java/cn/wildfirechat/sdk/utilities/AdminHttpUtils.java
+++ b/sdk/src/main/java/cn/wildfirechat/sdk/utilities/AdminHttpUtils.java
@@ -9,7 +9,9 @@ import org.apache.http.HttpStatus;
 import org.apache.http.client.HttpClient;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.entity.StringEntity;
+import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.impl.client.HttpClientBuilder;
+import org.apache.http.impl.client.HttpClients;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -24,10 +26,12 @@ public class AdminHttpUtils {
 
     private static String adminUrl;
     private static String adminSecret;
+    private static CloseableHttpClient httpClient;
 
     public static void init(String url, String secret) {
         adminUrl = url;
         adminSecret = secret;
+        httpClient = HttpClients.createDefault();
     }
 
     public static <T> IMResult<T> httpJsonPost(String path, Object object, Class<T> clazz) throws Exception{
@@ -42,15 +46,13 @@ public class AdminHttpUtils {
 
         String url = adminUrl + path;
         HttpPost post = null;
-        try {
-            HttpClient httpClient = HttpClientBuilder.create().build();
 
+        try {
             int nonce = (int)(Math.random() * 100000 + 3);
             long timestamp = System.currentTimeMillis();
             String str = nonce + "|" + adminSecret + "|" + timestamp;
             String sign = DigestUtils.sha1Hex(str);
 
-
             post = new HttpPost(url);
             post.setHeader("Content-type", "application/json; charset=utf-8");
             post.setHeader("Connection", "Keep-Alive");
diff --git a/sdk/src/main/java/cn/wildfirechat/sdk/utilities/ChannelHttpUtils.java b/sdk/src/main/java/cn/wildfirechat/sdk/utilities/ChannelHttpUtils.java
index 16bca8fa..0516d23b 100644
--- a/sdk/src/main/java/cn/wildfirechat/sdk/utilities/ChannelHttpUtils.java
+++ b/sdk/src/main/java/cn/wildfirechat/sdk/utilities/ChannelHttpUtils.java
@@ -9,7 +9,9 @@ import org.apache.http.HttpStatus;
 import org.apache.http.client.HttpClient;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.entity.StringEntity;
+import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.impl.client.HttpClientBuilder;
+import org.apache.http.impl.client.HttpClients;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -25,11 +27,13 @@ public class ChannelHttpUtils {
     private String imurl;
     private String channelId;
     private String channelSecret;
+    private final CloseableHttpClient httpClient;
 
     public ChannelHttpUtils(String imurl, String channelId, String secret) {
         this.imurl = imurl;
         this.channelId = channelId;
         this.channelSecret = secret;
+        this.httpClient = HttpClients.createDefault();
     }
 
     public <T> IMResult<T> httpJsonPost(String path, Object object, Class<T> clazz) throws Exception{
@@ -41,8 +45,6 @@ public class ChannelHttpUtils {
         String url = imurl + path;
         HttpPost post = null;
         try {
-            HttpClient httpClient = HttpClientBuilder.create().build();
-
             int nonce = (int)(Math.random() * 100000 + 3);
             long timestamp = System.currentTimeMillis();
             String str = nonce + "|" + channelSecret + "|" + timestamp;
diff --git a/sdk/src/main/java/cn/wildfirechat/sdk/utilities/RobotHttpUtils.java b/sdk/src/main/java/cn/wildfirechat/sdk/utilities/RobotHttpUtils.java
index 947def46..426db648 100644
--- a/sdk/src/main/java/cn/wildfirechat/sdk/utilities/RobotHttpUtils.java
+++ b/sdk/src/main/java/cn/wildfirechat/sdk/utilities/RobotHttpUtils.java
@@ -10,7 +10,9 @@ import org.apache.http.HttpStatus;
 import org.apache.http.client.HttpClient;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.entity.StringEntity;
+import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.impl.client.HttpClientBuilder;
+import org.apache.http.impl.client.HttpClients;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -26,11 +28,13 @@ public class RobotHttpUtils {
     private final String url;
     private final String robotId;
     private final String robotSecret;
+    private final CloseableHttpClient httpClient;
 
     public RobotHttpUtils(String url, String robotId, String robotSecret) {
         this.url = url;
         this.robotId = robotId;
         this.robotSecret = robotSecret;
+        this.httpClient = HttpClients.createDefault();
     }
 
 
@@ -43,8 +47,6 @@ public class RobotHttpUtils {
         String url = this.url + path;
         HttpPost post = null;
         try {
-            HttpClient httpClient = HttpClientBuilder.create().build();
-
             int nonce = (int)(Math.random() * 100000 + 3);
             long timestamp = System.currentTimeMillis();
             String str = nonce + "|" + robotSecret + "|" + timestamp;