diff --git a/tiup/tiup-playground.md b/tiup/tiup-playground.md
index 89f436bacfcff..459a760a06a1c 100644
--- a/tiup/tiup-playground.md
+++ b/tiup/tiup-playground.md
@@ -144,7 +144,7 @@ Starting from TiUP v1.15.0, you can deploy TiProxy for your cluster using TiUP P
     graceful-wait-before-shutdown=15
     ```
 
-    This configuration item controls the number of seconds TiDB waits before shutting down the server, avoiding client disconnections during cluster scaling-in operations.
+    This configuration item controls the duration (in seconds) that TiDB waits before shutting down the server, avoiding client disconnections during cluster scaling-in operations.
 
 2. Start the TiDB cluster: