diff --git a/docs/en/docs/sql-manual/sql-reference/Data-Types/CHAR.md b/docs/en/docs/sql-manual/sql-reference/Data-Types/CHAR.md
index ffbca3621c..d876498a4b 100644
--- a/docs/en/docs/sql-manual/sql-reference/Data-Types/CHAR.md
+++ b/docs/en/docs/sql-manual/sql-reference/Data-Types/CHAR.md
@@ -27,7 +27,7 @@ under the License.
 ## CHAR
 ### Description
 CHAR(M)
-A fixed-length string, M represents the length of a fixed-length string. The range of M is 1-255.
+A fixed-length string, M represents the byte length of a fixed-length string. The range of M is 1-255.
 
 ### keywords
 CHAR