diff --git a/docs/en/20-third-party/05-collectd.md b/docs/en/20-third-party/05-collectd.md
index db62f2ecd1afb4936466ca0243a7e14ff294f8b6..295c08c307ad0ecbe5ee03fc1a24e12c277db6a3 100644
--- a/docs/en/20-third-party/05-collectd.md
+++ b/docs/en/20-third-party/05-collectd.md
@@ -72,3 +72,7 @@ taos> select * from collectd.memory_value limit 10;
 Query OK, 10 row(s) in set (0.010348s)
 ```
 
+:::note
+
+- TDengine will automatically create unique IDs for sub-table names by the rule.
+:::
diff --git a/docs/zh/20-third-party/05-collectd.md b/docs/zh/20-third-party/05-collectd.md
index cc2235f2600ec44425a2f22f39dc3c58a4ccdd5a..d55b981fb999dcea465f460455b604300f2e8d7b 100644
--- a/docs/zh/20-third-party/05-collectd.md
+++ b/docs/zh/20-third-party/05-collectd.md
@@ -72,3 +72,7 @@ taos> select * from collectd.memory_value limit 10;
 Query OK, 10 row(s) in set (0.010348s)
 ```
 
+:::note
+
+- TDengine 默认生成的子表名是根据规则生成的唯一 ID 值。
+:::