diff --git a/docs-2.0/3.ngql-guide/4.variable-and-composite-queries/2.user-defined-variables.md b/docs-2.0/3.ngql-guide/4.variable-and-composite-queries/2.user-defined-variables.md
index b80905d6d48..aeef106bf1f 100644
--- a/docs-2.0/3.ngql-guide/4.variable-and-composite-queries/2.user-defined-variables.md
+++ b/docs-2.0/3.ngql-guide/4.variable-and-composite-queries/2.user-defined-variables.md
@@ -31,7 +31,8 @@ You can use user-defined variables in composite queries. Details about composite
 
 !!! note
 
-    User-defined variables are case-sensitive.
+    - User-defined variables are case-sensitive.
+    - To define a user-defined variable in a compound statement, end the statement with a semicolon (;). For details, please refer to the [nGQL Style Guide](../../3.ngql-guide/1.nGQL-overview/ngql-style-guide.md).
 
 ## Example