diff --git a/circle_app/lib/app/msg/TIMUIKitConversation/tim_uikit_conversation.dart b/circle_app/lib/app/msg/TIMUIKitConversation/tim_uikit_conversation.dart
index 7598849..44c646c 100644
--- a/circle_app/lib/app/msg/TIMUIKitConversation/tim_uikit_conversation.dart
+++ b/circle_app/lib/app/msg/TIMUIKitConversation/tim_uikit_conversation.dart
@@ -455,7 +455,7 @@ class _TIMConversationState extends TIMUIKitState<TIMConversation> {
                                   Map myInfo = jsonDecode(myuserFullInfo!
                                       .customInfo!['Label']
                                       .toString());
-                                  if (myInfo.containsKey('city')) {
+                                  if (null!=myInfo&&myInfo.containsKey('city')) {
                                     if (myInfo['city']
                                         .toString()
                                         .contains(otherInfo['city'].toString())) {