diff --git a/docs/en/20-third-party/02-prometheus.md b/docs/en/20-third-party/02-prometheus.md
index 0fb41a1696..c46b0381b9 100644
--- a/docs/en/20-third-party/02-prometheus.md
+++ b/docs/en/20-third-party/02-prometheus.md
@@ -89,3 +89,7 @@ VALUE    TIMESTAMP
 
 ```
 
+:::note
+
+- TDengine will automatically create unique IDs for sub-table names by the rule.
+:::
diff --git a/docs/zh/20-third-party/02-prometheus.md b/docs/zh/20-third-party/02-prometheus.md
index eb6c3bf1d0..59bab1823a 100644
--- a/docs/zh/20-third-party/02-prometheus.md
+++ b/docs/zh/20-third-party/02-prometheus.md
@@ -88,3 +88,7 @@ VALUE    TIMESTAMP
 
 ```
 
+:::note
+
+- TDengine 默认生成的子表名是根据规则生成的唯一 ID 值。
+:::