diff --git a/mybatis-flex-test/mybatis-flex-spring-boot-test/pom.xml b/mybatis-flex-test/mybatis-flex-spring-boot-test/pom.xml
index e22dd90b..32b67e43 100644
--- a/mybatis-flex-test/mybatis-flex-spring-boot-test/pom.xml
+++ b/mybatis-flex-test/mybatis-flex-spring-boot-test/pom.xml
@@ -29,6 +29,12 @@
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>com.alibaba.fastjson2</groupId>
+            <artifactId>fastjson2</artifactId>
+            <version>2.0.32</version>
+        </dependency>
+
 <!--        <dependency>-->
 <!--            <groupId>org.springframework.boot</groupId>-->
 <!--            <artifactId>spring-boot-starter-jdbc</artifactId>-->
diff --git a/mybatis-flex-test/mybatis-flex-spring-boot-test/src/test/java/com/mybatisflex/test/common/CloneTest.java b/mybatis-flex-test/mybatis-flex-spring-boot-test/src/test/java/com/mybatisflex/test/common/CloneTest.java
index 9a06c427..4a59fe0b 100644
--- a/mybatis-flex-test/mybatis-flex-spring-boot-test/src/test/java/com/mybatisflex/test/common/CloneTest.java
+++ b/mybatis-flex-test/mybatis-flex-spring-boot-test/src/test/java/com/mybatisflex/test/common/CloneTest.java
@@ -16,6 +16,8 @@
 
 package com.mybatisflex.test.common;
 
+import com.alibaba.fastjson2.JSON;
+import com.alibaba.fastjson2.JSONWriter;
 import com.mybatisflex.core.query.QueryWrapper;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
@@ -23,7 +25,7 @@ import org.junit.jupiter.api.Test;
 import java.util.Arrays;
 import java.util.function.Supplier;
 
-import static com.mybatisflex.core.query.QueryMethods.case_;
+import static com.mybatisflex.core.query.QueryMethods.count;
 import static com.mybatisflex.core.query.QueryMethods.distinct;
 import static com.mybatisflex.test.model.table.RoleTableDef.ROLE;
 import static com.mybatisflex.test.model.table.UserRoleTableDef.USER_ROLE;
@@ -35,18 +37,27 @@ import static com.mybatisflex.test.model.table.UserTableDef.USER;
  */
 class CloneTest {
 
+    @Test
+    void test03() {
+        String jsonString = JSON.toJSONString(newQueryWrapper(), JSONWriter.Feature.FieldBased, JSONWriter.Feature.ReferenceDetection);
+        System.out.println(jsonString);
+    }
+
     @Test
     void test() {
         QueryWrapper queryWrapper = newQueryWrapper();
+        Class<QueryWrapper> queryWrapperClass = QueryWrapper.class;
         int count = 10000;
 
         /*
-         * new: 50 ms
-         * clone: 68 ms
-         * serial: 2634 ms
+         * new: 41ms
+         * clone: 65ms
+         * fastjson: 620ms
+         * serial: 2003ms
          */
         calcTime(count, "new", this::newQueryWrapper);
         calcTime(count, "clone", queryWrapper::clone);
+        calcTime(count, "fastjson", () -> SerialUtil.cloneObject(queryWrapper, queryWrapperClass));
         calcTime(count, "serial", () -> SerialUtil.cloneObject(queryWrapper));
     }
 
@@ -55,12 +66,16 @@ class CloneTest {
         QueryWrapper queryWrapper = newQueryWrapper();
         QueryWrapper queryWrapper1 = queryWrapper.clone();
         QueryWrapper queryWrapper2 = SerialUtil.cloneObject(queryWrapper);
+        QueryWrapper queryWrapper3 = SerialUtil.cloneObject(queryWrapper, QueryWrapper.class);
+        System.err.println(SerialUtil.toJSONString(queryWrapper));
         System.out.println(queryWrapper.toSQL());
         System.out.println(queryWrapper1.toSQL());
         System.out.println(queryWrapper2.toSQL());
+        System.out.println(queryWrapper3.toSQL());
 
-        Assertions.assertEquals(queryWrapper.toSQL(),queryWrapper1.toSQL());
-        Assertions.assertEquals(queryWrapper.toSQL(),queryWrapper2.toSQL());
+        Assertions.assertEquals(queryWrapper.toSQL(), queryWrapper1.toSQL());
+        Assertions.assertEquals(queryWrapper.toSQL(), queryWrapper2.toSQL());
+        Assertions.assertEquals(queryWrapper.toSQL(), queryWrapper3.toSQL());
     }
 
     private void calcTime(int count, String type, Supplier<QueryWrapper> supplier) {
@@ -74,13 +89,13 @@ class CloneTest {
 
     private QueryWrapper newQueryWrapper() {
         return QueryWrapper.create()
-                .select(case_()
+                .select(count(distinct(USER.USER_ID))/*case_()
                                 .when(USER.USER_ID.eq(3)).then("x3")
                                 .when(USER.USER_ID.eq(5)).then("x4")
                                 .end(),
                         distinct(USER.USER_ID.add(4)),
                         USER.USER_NAME,
-                        ROLE.ALL_COLUMNS)
+                        ROLE.ALL_COLUMNS*/)
                 .from(USER.as("u"))
                 .leftJoin(USER_ROLE).as("ur").on(USER_ROLE.USER_ID.eq(USER.USER_ID))
                 .leftJoin(ROLE).as("r").on(USER_ROLE.ROLE_ID.eq(ROLE.ROLE_ID))
diff --git a/mybatis-flex-test/mybatis-flex-spring-boot-test/src/test/java/com/mybatisflex/test/common/SerialUtil.java b/mybatis-flex-test/mybatis-flex-spring-boot-test/src/test/java/com/mybatisflex/test/common/SerialUtil.java
index 7859baf3..3eb135ed 100644
--- a/mybatis-flex-test/mybatis-flex-spring-boot-test/src/test/java/com/mybatisflex/test/common/SerialUtil.java
+++ b/mybatis-flex-test/mybatis-flex-spring-boot-test/src/test/java/com/mybatisflex/test/common/SerialUtil.java
@@ -16,6 +16,10 @@
 
 package com.mybatisflex.test.common;
 
+import com.alibaba.fastjson2.JSON;
+import com.alibaba.fastjson2.JSONReader;
+import com.alibaba.fastjson2.JSONWriter;
+
 import java.io.*;
 
 /**
@@ -51,4 +55,20 @@ public class SerialUtil {
         return (T) readObject(writeObject(obj));
     }
 
+    public static String toJSONString(Object obj) {
+        return JSON.toJSONString(obj, JSONWriter.Feature.FieldBased,
+                JSONWriter.Feature.WriteClassName,
+                JSONWriter.Feature.NotWriteRootClassName,
+                JSONWriter.Feature.ReferenceDetection);
+    }
+
+    public static <T> T parseObject(String str, Class<T> tClass) {
+        return JSON.parseObject(str, tClass, JSONReader.Feature.FieldBased,
+                JSONReader.Feature.SupportClassForName);
+    }
+
+    public static <T> T cloneObject(Object obj, Class<T> tClass) {
+        return parseObject(toJSONString(obj), tClass);
+    }
+
 }
\ No newline at end of file