diff --git a/src/site/zh/xdoc/configuration.xml b/src/site/zh/xdoc/configuration.xml
index 39f21611ea2..e9daf5d449c 100644
--- a/src/site/zh/xdoc/configuration.xml
+++ b/src/site/zh/xdoc/configuration.xml
@@ -1018,10 +1018,6 @@ public class GenericTypeHandler<E extends MyObject> extends BaseTypeHandler<E> {
     PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
     "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 
-<!DOCTYPE mapper
-    PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
-    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
-
 <mapper namespace="org.apache.ibatis.submitted.rounding.Mapper">
 	<resultMap type="org.apache.ibatis.submitted.rounding.User" id="usermap">
 		<id column="id" property="id"/>