diff --git a/wkim/src/main/java/com/xinbida/wukongim/manager/ChannelManager.java b/wkim/src/main/java/com/xinbida/wukongim/manager/ChannelManager.java
index 1d30cc1..fdf966f 100644
--- a/wkim/src/main/java/com/xinbida/wukongim/manager/ChannelManager.java
+++ b/wkim/src/main/java/com/xinbida/wukongim/manager/ChannelManager.java
@@ -22,6 +22,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 /**
  * 5/20/21 5:49 PM
@@ -43,7 +44,7 @@ public class ChannelManager extends BaseManager {
 
     private IRefreshChannelAvatar iRefreshChannelAvatar;
     private IGetChannelInfo iGetChannelInfo;
-    private final List<WKChannel> wkChannelList = Collections.synchronizedList(new ArrayList<>());
+    private final CopyOnWriteArrayList<WKChannel> wkChannelList = new CopyOnWriteArrayList<>();
     //监听刷新频道
     private ConcurrentHashMap<String, IRefreshChannel> refreshChannelMap;
 
diff --git a/wkim/src/main/java/com/xinbida/wukongim/manager/ConversationManager.java b/wkim/src/main/java/com/xinbida/wukongim/manager/ConversationManager.java
index 6c3d3e4..7cbcef4 100644
--- a/wkim/src/main/java/com/xinbida/wukongim/manager/ConversationManager.java
+++ b/wkim/src/main/java/com/xinbida/wukongim/manager/ConversationManager.java
@@ -24,6 +24,7 @@ import com.xinbida.wukongim.interfaces.ISyncConversationChat;
 import com.xinbida.wukongim.interfaces.ISyncConversationChatBack;
 import com.xinbida.wukongim.message.type.WKConnectStatus;
 import com.xinbida.wukongim.message.type.WKMsgContentType;
+import com.xinbida.wukongim.utils.DispatchQueuePool;
 import com.xinbida.wukongim.utils.WKCommonUtils;
 import com.xinbida.wukongim.utils.WKLoggerUtils;
 
@@ -41,6 +42,8 @@ import java.util.concurrent.ConcurrentHashMap;
  * 最近会话管理
  */
 public class ConversationManager extends BaseManager {
+    private final DispatchQueuePool dispatchQueuePool = new DispatchQueuePool(3);
+
     private final String TAG = "ConversationManager";
 
     private ConversationManager() {
@@ -238,7 +241,7 @@ public class ConversationManager extends BaseManager {
             long version = ConversationDbManager.getInstance().queryMaxVersion();
             String lastMsgSeqStr = ConversationDbManager.getInstance().queryLastMsgSeqs();
             runOnMainThread(() -> iSyncConversationChat.syncConversationChat(lastMsgSeqStr, 20, version, syncChat -> {
-                new Thread(() -> saveSyncChat(syncChat, () -> iSyncConversationChatBack.onBack(syncChat))).start();
+                dispatchQueuePool.execute(() -> saveSyncChat(syncChat, () -> iSyncConversationChatBack.onBack(syncChat)));
             }));
         }
     }
diff --git a/wkim/src/main/java/com/xinbida/wukongim/utils/CryptoUtils.java b/wkim/src/main/java/com/xinbida/wukongim/utils/CryptoUtils.java
index 603f393..24ef6f9 100644
--- a/wkim/src/main/java/com/xinbida/wukongim/utils/CryptoUtils.java
+++ b/wkim/src/main/java/com/xinbida/wukongim/utils/CryptoUtils.java
@@ -139,7 +139,7 @@ public class CryptoUtils {
 
 
     public byte[] base64Decode(String data) {
-         return Base64.decode(data, Base64.NO_WRAP);
+        return Base64.decode(data, Base64.NO_WRAP);
     }
 
     /**