diff --git a/ticdc/ticdc-sink-to-kafka.md b/ticdc/ticdc-sink-to-kafka.md
index 42bda65dd11a7..4eb8986be1232 100644
--- a/ticdc/ticdc-sink-to-kafka.md
+++ b/ticdc/ticdc-sink-to-kafka.md
@@ -355,7 +355,7 @@ The message format with handle keys only is as follows:
     ],
     "old": null,
     "_tidb": {     // TiDB extension fields
-        "commitTs": 163963314122145239,
+        "commitTs": 429918007904436226, // A TiDB TSO timestamp
         "onlyHandleKey": true
     }
 }