diff --git a/im-center-server/src/main/java/cn/axzo/im/group/GroupBroadcaster.java b/im-center-server/src/main/java/cn/axzo/im/group/GroupBroadcaster.java
index 01164c4..e6dc02a 100644
--- a/im-center-server/src/main/java/cn/axzo/im/group/GroupBroadcaster.java
+++ b/im-center-server/src/main/java/cn/axzo/im/group/GroupBroadcaster.java
@@ -41,7 +41,7 @@ class GroupBroadcaster {
             message.setGroup(BeanMapper.copyBean(effectiveGroup, GroupInfo.class));
             message.setMember(BeanMapper.copyBean(account, GroupMemberInfo.class));
             Event event = Event.builder()
-                    .targetId(String.format("%d:%d", group.getTid(), account.getPersonId()))
+                    .targetId(group.getTid() + "")
                     .targetType(eventType.getModel())
                     .eventCode(eventType.getEventCode())
                     .shardingKey(group.getId() + "")