diff --git a/docs/zh/14-reference/03-connector/java.mdx b/docs/zh/14-reference/03-connector/java.mdx
index ddab9e5f24c64e51e82cad6e299f3ea0d741b349..836bf49ce3eaed141a51b4868388e6310cc90790 100644
--- a/docs/zh/14-reference/03-connector/java.mdx
+++ b/docs/zh/14-reference/03-connector/java.mdx
@@ -368,7 +368,7 @@ public class ParameterBindingDemo {
 
     private static final String host = "127.0.0.1";
     private static final Random random = new Random(System.currentTimeMillis());
-    private static final int BINARY_COLUMN_SIZE = 20;
+    private static final int BINARY_COLUMN_SIZE = 30;
     private static final String[] schemaList = {
             "create table stable1(ts timestamp, f1 tinyint, f2 smallint, f3 int, f4 bigint) tags(t1 tinyint, t2 smallint, t3 int, t4 bigint)",
             "create table stable2(ts timestamp, f1 float, f2 double) tags(t1 float, t2 double)",