diff --git a/src/main/java/club/joylink/xiannccda/mock/message/occ/MockOccServer.java b/src/main/java/club/joylink/xiannccda/mock/message/occ/MockOccServer.java
index 2af6991..e456eb5 100644
--- a/src/main/java/club/joylink/xiannccda/mock/message/occ/MockOccServer.java
+++ b/src/main/java/club/joylink/xiannccda/mock/message/occ/MockOccServer.java
@@ -148,6 +148,8 @@ public class MockOccServer {
       } else if (messageId == MessageId.TRAIN_INDICATION_UPDATE) {
         MockTrainUpdateReq req = new MockTrainUpdateReq(messageId, lineId, rtuId_.shortValue(), di.getDeviceType(), di.getDeviceName(), md.deviceStatus());
         req.setTime(Instant.ofEpochMilli(System.currentTimeMillis()).getEpochSecond());
+        req.setGroup_id(md.getGroupId());
+        req.setGlobal_id(md.getGroupId());
         list.add(req);
       }
     }