diff --git a/agent/pom.xml b/agent/pom.xml
index 86ac5e0..6f2cdce 100755
--- a/agent/pom.xml
+++ b/agent/pom.xml
@@ -34,7 +34,7 @@
         <configuration>
           <archive>
             <manifestEntries>
-              <Premain-Class>com.alibaba.testable.PreMain</Premain-Class>
+              <Premain-Class>com.alibaba.testable.agent.PreMain</Premain-Class>
               <Can-Retransform-Classes>true</Can-Retransform-Classes>
             </manifestEntries>
           </archive>
diff --git a/agent/src/main/java/com/alibaba/testable/PreMain.java b/agent/src/main/java/com/alibaba/testable/agent/PreMain.java
similarity index 74%
rename from agent/src/main/java/com/alibaba/testable/PreMain.java
rename to agent/src/main/java/com/alibaba/testable/agent/PreMain.java
index 8459c0c..35f74e5 100755
--- a/agent/src/main/java/com/alibaba/testable/PreMain.java
+++ b/agent/src/main/java/com/alibaba/testable/agent/PreMain.java
@@ -1,6 +1,6 @@
-package com.alibaba.testable;
+package com.alibaba.testable.agent;
 
-import com.alibaba.testable.transformer.TestableClassTransformer;
+import com.alibaba.testable.agent.transformer.TestableClassTransformer;
 
 import java.lang.instrument.Instrumentation;
 
diff --git a/agent/src/main/java/com/alibaba/testable/constant/Const.java b/agent/src/main/java/com/alibaba/testable/agent/constant/Const.java
similarity index 88%
rename from agent/src/main/java/com/alibaba/testable/constant/Const.java
rename to agent/src/main/java/com/alibaba/testable/agent/constant/Const.java
index f75f880..92ba48b 100644
--- a/agent/src/main/java/com/alibaba/testable/constant/Const.java
+++ b/agent/src/main/java/com/alibaba/testable/agent/constant/Const.java
@@ -1,4 +1,4 @@
-package com.alibaba.testable.constant;
+package com.alibaba.testable.agent.constant;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/agent/src/main/java/com/alibaba/testable/handler/TestableClassHandler.java b/agent/src/main/java/com/alibaba/testable/agent/handler/TestableClassHandler.java
similarity index 91%
rename from agent/src/main/java/com/alibaba/testable/handler/TestableClassHandler.java
rename to agent/src/main/java/com/alibaba/testable/agent/handler/TestableClassHandler.java
index 15ee99f..81ff5a6 100644
--- a/agent/src/main/java/com/alibaba/testable/handler/TestableClassHandler.java
+++ b/agent/src/main/java/com/alibaba/testable/agent/handler/TestableClassHandler.java
@@ -1,6 +1,8 @@
-package com.alibaba.testable.handler;
+package com.alibaba.testable.agent.handler;
 
-import com.alibaba.testable.util.ClassUtil;
+import com.alibaba.testable.agent.constant.Const;
+import com.alibaba.testable.agent.util.ClassUtil;
+import com.alibaba.testable.agent.util.StringUtil;
 import org.objectweb.asm.ClassReader;
 import org.objectweb.asm.ClassWriter;
 import org.objectweb.asm.Opcodes;
@@ -11,8 +13,6 @@ import java.io.IOException;
 import java.util.HashSet;
 import java.util.Set;
 
-import static com.alibaba.testable.constant.Const.SYS_CLASSES;
-
 /**
  * @author flin
  */
@@ -61,7 +61,7 @@ public class TestableClassHandler implements Opcodes {
                         instructions = replaceMemberCallOps(mn, instructions, rangeStart, i);
                         i = rangeStart;
                     }
-                } else if (CONSTRUCTOR.equals(node.name) && !SYS_CLASSES.contains(node.owner)) {
+                } else if (CONSTRUCTOR.equals(node.name) && !Const.SYS_CLASSES.contains(node.owner)) {
                     int rangeStart = getConstructorStart(instructions, node.owner, i);
                     if (rangeStart >= 0) {
                         instructions = replaceNewOps(mn, instructions, rangeStart, i);
@@ -109,7 +109,7 @@ public class TestableClassHandler implements Opcodes {
 
     private String getConstructorSubstitutionDesc(String constructorDesc) {
         int paramCount = ClassUtil.getParameterCount(constructorDesc);
-        return CONSTRUCTOR_DESC_PREFIX + ClassUtil.repeat(OBJECT_DESC, paramCount) + METHOD_DESC_POSTFIX;
+        return CONSTRUCTOR_DESC_PREFIX + StringUtil.repeat(OBJECT_DESC, paramCount) + METHOD_DESC_POSTFIX;
     }
 
     private AbstractInsnNode[] replaceMemberCallOps(MethodNode mn, AbstractInsnNode[] instructions, int start, int end) {
@@ -129,7 +129,7 @@ public class TestableClassHandler implements Opcodes {
 
     private String getMethodSubstitutionDesc(String methodDesc) {
         int paramCount = ClassUtil.getParameterCount(methodDesc);
-        return METHOD_DESC_PREFIX + ClassUtil.repeat(OBJECT_DESC, paramCount) + METHOD_DESC_POSTFIX;
+        return METHOD_DESC_PREFIX + StringUtil.repeat(OBJECT_DESC, paramCount) + METHOD_DESC_POSTFIX;
     }
 
 }
diff --git a/agent/src/main/java/com/alibaba/testable/model/MethodInfo.java b/agent/src/main/java/com/alibaba/testable/agent/model/MethodInfo.java
similarity index 94%
rename from agent/src/main/java/com/alibaba/testable/model/MethodInfo.java
rename to agent/src/main/java/com/alibaba/testable/agent/model/MethodInfo.java
index 0e9fabd..d2ee60b 100644
--- a/agent/src/main/java/com/alibaba/testable/model/MethodInfo.java
+++ b/agent/src/main/java/com/alibaba/testable/agent/model/MethodInfo.java
@@ -1,4 +1,4 @@
-package com.alibaba.testable.model;
+package com.alibaba.testable.agent.model;
 
 /**
  * @author flin
diff --git a/agent/src/main/java/com/alibaba/testable/transformer/TestableClassTransformer.java b/agent/src/main/java/com/alibaba/testable/agent/transformer/TestableClassTransformer.java
similarity index 92%
rename from agent/src/main/java/com/alibaba/testable/transformer/TestableClassTransformer.java
rename to agent/src/main/java/com/alibaba/testable/agent/transformer/TestableClassTransformer.java
index eb4d989..dc0a1c1 100644
--- a/agent/src/main/java/com/alibaba/testable/transformer/TestableClassTransformer.java
+++ b/agent/src/main/java/com/alibaba/testable/agent/transformer/TestableClassTransformer.java
@@ -1,7 +1,7 @@
-package com.alibaba.testable.transformer;
+package com.alibaba.testable.agent.transformer;
 
-import com.alibaba.testable.handler.TestableClassHandler;
-import com.alibaba.testable.util.ClassUtil;
+import com.alibaba.testable.agent.handler.TestableClassHandler;
+import com.alibaba.testable.agent.util.ClassUtil;
 
 import java.io.IOException;
 import java.lang.instrument.ClassFileTransformer;
diff --git a/agent/src/main/java/com/alibaba/testable/util/ClassUtil.java b/agent/src/main/java/com/alibaba/testable/agent/util/ClassUtil.java
similarity index 88%
rename from agent/src/main/java/com/alibaba/testable/util/ClassUtil.java
rename to agent/src/main/java/com/alibaba/testable/agent/util/ClassUtil.java
index fdb73e9..4fc71b8 100644
--- a/agent/src/main/java/com/alibaba/testable/util/ClassUtil.java
+++ b/agent/src/main/java/com/alibaba/testable/agent/util/ClassUtil.java
@@ -1,5 +1,6 @@
-package com.alibaba.testable.util;
+package com.alibaba.testable.agent.util;
 
+import com.alibaba.testable.agent.constant.Const;
 import org.objectweb.asm.ClassReader;
 import org.objectweb.asm.tree.AnnotationNode;
 import org.objectweb.asm.tree.ClassNode;
@@ -8,8 +9,6 @@ import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 
-import static com.alibaba.testable.constant.Const.*;
-
 /**
  * @author flin
  */
@@ -28,13 +27,17 @@ public class ClassUtil {
     private static final char CLASS_END = ';';
     private static final char TYPE_ARRAY = '[';
 
+    /**
+     * Get annotation on class definition
+     * @param className class that need to explore
+     */
     public static List<String> getAnnotations(String className) {
         try {
             List<String> annotations = new ArrayList<String>();
             ClassNode cn = new ClassNode();
             new ClassReader(className).accept(cn, 0);
             for (AnnotationNode an : cn.visibleAnnotations) {
-                String annotationName = an.desc.replace(SLASH, DOT).substring(1, an.desc.length() - 1);
+                String annotationName = an.desc.replace(Const.SLASH, Const.DOT).substring(1, an.desc.length() - 1);
                 annotations.add(annotationName);
             }
             return annotations;
@@ -95,12 +98,4 @@ public class ClassUtil {
         }
     }
 
-    public static String repeat(String text, int times) {
-        StringBuilder sb = new StringBuilder();
-        for (int i = 0; i < times; i++) {
-            sb.append(text);
-        }
-        return sb.toString();
-    }
-
 }
diff --git a/agent/src/main/java/com/alibaba/testable/agent/util/StringUtil.java b/agent/src/main/java/com/alibaba/testable/agent/util/StringUtil.java
new file mode 100644
index 0000000..0eaec24
--- /dev/null
+++ b/agent/src/main/java/com/alibaba/testable/agent/util/StringUtil.java
@@ -0,0 +1,16 @@
+package com.alibaba.testable.agent.util;
+
+/**
+ * @author flin
+ */
+public class StringUtil {
+
+    public static String repeat(String text, int times) {
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < times; i++) {
+            sb.append(text);
+        }
+        return sb.toString();
+    }
+
+}
diff --git a/agent/src/test/java/com/alibaba/testable/util/ClassUtilTest.java b/agent/src/test/java/com/alibaba/testable/agent/util/ClassUtilTest.java
similarity index 96%
rename from agent/src/test/java/com/alibaba/testable/util/ClassUtilTest.java
rename to agent/src/test/java/com/alibaba/testable/agent/util/ClassUtilTest.java
index bafbcbf..692c1d9 100644
--- a/agent/src/test/java/com/alibaba/testable/util/ClassUtilTest.java
+++ b/agent/src/test/java/com/alibaba/testable/agent/util/ClassUtilTest.java
@@ -1,4 +1,4 @@
-package com.alibaba.testable.util;
+package com.alibaba.testable.agent.util;
 
 import org.junit.jupiter.api.Test;
 
diff --git a/core/src/main/java/com/alibaba/testable/accessor/PrivateAccessor.java b/core/src/main/java/com/alibaba/testable/core/accessor/PrivateAccessor.java
similarity index 93%
rename from core/src/main/java/com/alibaba/testable/accessor/PrivateAccessor.java
rename to core/src/main/java/com/alibaba/testable/core/accessor/PrivateAccessor.java
index 76d15c8..90d9252 100644
--- a/core/src/main/java/com/alibaba/testable/accessor/PrivateAccessor.java
+++ b/core/src/main/java/com/alibaba/testable/core/accessor/PrivateAccessor.java
@@ -1,6 +1,6 @@
-package com.alibaba.testable.accessor;
+package com.alibaba.testable.core.accessor;
 
-import com.alibaba.testable.util.TypeUtil;
+import com.alibaba.testable.core.util.TypeUtil;
 
 import java.lang.reflect.Field;
 import java.lang.reflect.Method;
diff --git a/core/src/main/java/com/alibaba/testable/annotation/EnableTestable.java b/core/src/main/java/com/alibaba/testable/core/annotation/EnableTestable.java
similarity index 84%
rename from core/src/main/java/com/alibaba/testable/annotation/EnableTestable.java
rename to core/src/main/java/com/alibaba/testable/core/annotation/EnableTestable.java
index 2417d56..ff3c60a 100644
--- a/core/src/main/java/com/alibaba/testable/annotation/EnableTestable.java
+++ b/core/src/main/java/com/alibaba/testable/core/annotation/EnableTestable.java
@@ -1,4 +1,4 @@
-package com.alibaba.testable.annotation;
+package com.alibaba.testable.core.annotation;
 
 import java.lang.annotation.*;
 
diff --git a/core/src/main/java/com/alibaba/testable/annotation/TestableInject.java b/core/src/main/java/com/alibaba/testable/core/annotation/TestableInject.java
similarity index 83%
rename from core/src/main/java/com/alibaba/testable/annotation/TestableInject.java
rename to core/src/main/java/com/alibaba/testable/core/annotation/TestableInject.java
index 219d144..74381d6 100644
--- a/core/src/main/java/com/alibaba/testable/annotation/TestableInject.java
+++ b/core/src/main/java/com/alibaba/testable/core/annotation/TestableInject.java
@@ -1,4 +1,4 @@
-package com.alibaba.testable.annotation;
+package com.alibaba.testable.core.annotation;
 
 import java.lang.annotation.*;
 
diff --git a/core/src/main/java/com/alibaba/testable/generator/BaseGenerator.java b/core/src/main/java/com/alibaba/testable/core/generator/BaseGenerator.java
similarity index 85%
rename from core/src/main/java/com/alibaba/testable/generator/BaseGenerator.java
rename to core/src/main/java/com/alibaba/testable/core/generator/BaseGenerator.java
index 0c92595..884943f 100644
--- a/core/src/main/java/com/alibaba/testable/generator/BaseGenerator.java
+++ b/core/src/main/java/com/alibaba/testable/core/generator/BaseGenerator.java
@@ -1,6 +1,6 @@
-package com.alibaba.testable.generator;
+package com.alibaba.testable.core.generator;
 
-import com.alibaba.testable.model.TestableContext;
+import com.alibaba.testable.core.model.TestableContext;
 import com.sun.tools.javac.tree.JCTree.*;
 
 /**
diff --git a/core/src/main/java/com/alibaba/testable/generator/PrivateAccessStatementGenerator.java b/core/src/main/java/com/alibaba/testable/core/generator/PrivateAccessStatementGenerator.java
similarity index 89%
rename from core/src/main/java/com/alibaba/testable/generator/PrivateAccessStatementGenerator.java
rename to core/src/main/java/com/alibaba/testable/core/generator/PrivateAccessStatementGenerator.java
index 216eb54..23d69d9 100644
--- a/core/src/main/java/com/alibaba/testable/generator/PrivateAccessStatementGenerator.java
+++ b/core/src/main/java/com/alibaba/testable/core/generator/PrivateAccessStatementGenerator.java
@@ -1,7 +1,7 @@
-package com.alibaba.testable.generator;
+package com.alibaba.testable.core.generator;
 
-import com.alibaba.testable.model.TestableContext;
-import com.alibaba.testable.util.ConstPool;
+import com.alibaba.testable.core.model.TestableContext;
+import com.alibaba.testable.core.util.ConstPool;
 import com.sun.tools.javac.tree.JCTree.*;
 import com.sun.tools.javac.util.List;
 import com.sun.tools.javac.util.ListBuffer;
diff --git a/core/src/main/java/com/alibaba/testable/generator/TestSetupMethodGenerator.java b/core/src/main/java/com/alibaba/testable/core/generator/TestSetupMethodGenerator.java
similarity index 95%
rename from core/src/main/java/com/alibaba/testable/generator/TestSetupMethodGenerator.java
rename to core/src/main/java/com/alibaba/testable/core/generator/TestSetupMethodGenerator.java
index 8e6294e..e31d29e 100644
--- a/core/src/main/java/com/alibaba/testable/generator/TestSetupMethodGenerator.java
+++ b/core/src/main/java/com/alibaba/testable/core/generator/TestSetupMethodGenerator.java
@@ -1,8 +1,7 @@
-package com.alibaba.testable.generator;
+package com.alibaba.testable.core.generator;
 
-import com.alibaba.testable.model.TestLibType;
-import com.alibaba.testable.model.TestableContext;
-import com.alibaba.testable.util.ConstPool;
+import com.alibaba.testable.core.model.TestableContext;
+import com.alibaba.testable.core.util.ConstPool;
 import com.sun.tools.javac.code.Type;
 import com.sun.tools.javac.tree.JCTree.*;
 import com.sun.tools.javac.util.List;
diff --git a/core/src/main/java/com/alibaba/testable/model/TestableContext.java b/core/src/main/java/com/alibaba/testable/core/model/TestableContext.java
similarity index 93%
rename from core/src/main/java/com/alibaba/testable/model/TestableContext.java
rename to core/src/main/java/com/alibaba/testable/core/model/TestableContext.java
index 1559ef0..85158cf 100644
--- a/core/src/main/java/com/alibaba/testable/model/TestableContext.java
+++ b/core/src/main/java/com/alibaba/testable/core/model/TestableContext.java
@@ -1,6 +1,6 @@
-package com.alibaba.testable.model;
+package com.alibaba.testable.core.model;
 
-import com.alibaba.testable.util.TestableLogger;
+import com.alibaba.testable.core.util.TestableLogger;
 import com.sun.tools.javac.api.JavacTrees;
 import com.sun.tools.javac.tree.TreeMaker;
 import com.sun.tools.javac.util.Names;
diff --git a/core/src/main/java/com/alibaba/testable/processor/BaseProcessor.java b/core/src/main/java/com/alibaba/testable/core/processor/BaseProcessor.java
similarity index 86%
rename from core/src/main/java/com/alibaba/testable/processor/BaseProcessor.java
rename to core/src/main/java/com/alibaba/testable/core/processor/BaseProcessor.java
index bce23aa..a08e508 100644
--- a/core/src/main/java/com/alibaba/testable/processor/BaseProcessor.java
+++ b/core/src/main/java/com/alibaba/testable/core/processor/BaseProcessor.java
@@ -1,7 +1,7 @@
-package com.alibaba.testable.processor;
+package com.alibaba.testable.core.processor;
 
-import com.alibaba.testable.model.TestableContext;
-import com.alibaba.testable.util.TestableLogger;
+import com.alibaba.testable.core.model.TestableContext;
+import com.alibaba.testable.core.util.TestableLogger;
 import com.sun.tools.javac.api.JavacTrees;
 import com.sun.tools.javac.processing.JavacProcessingEnvironment;
 import com.sun.tools.javac.tree.TreeMaker;
diff --git a/core/src/main/java/com/alibaba/testable/processor/EnableTestableProcessor.java b/core/src/main/java/com/alibaba/testable/core/processor/EnableTestableProcessor.java
similarity index 93%
rename from core/src/main/java/com/alibaba/testable/processor/EnableTestableProcessor.java
rename to core/src/main/java/com/alibaba/testable/core/processor/EnableTestableProcessor.java
index d9c8ed2..9df1448 100644
--- a/core/src/main/java/com/alibaba/testable/processor/EnableTestableProcessor.java
+++ b/core/src/main/java/com/alibaba/testable/core/processor/EnableTestableProcessor.java
@@ -1,8 +1,8 @@
-package com.alibaba.testable.processor;
+package com.alibaba.testable.core.processor;
 
-import com.alibaba.testable.annotation.EnableTestable;
-import com.alibaba.testable.translator.EnableTestableTranslator;
-import com.alibaba.testable.util.ResourceUtil;
+import com.alibaba.testable.core.annotation.EnableTestable;
+import com.alibaba.testable.core.translator.EnableTestableTranslator;
+import com.alibaba.testable.core.util.ResourceUtil;
 import com.sun.tools.javac.code.Symbol;
 import com.sun.tools.javac.tree.JCTree;
 
diff --git a/core/src/main/java/com/alibaba/testable/translator/BaseTranslator.java b/core/src/main/java/com/alibaba/testable/core/translator/BaseTranslator.java
similarity index 93%
rename from core/src/main/java/com/alibaba/testable/translator/BaseTranslator.java
rename to core/src/main/java/com/alibaba/testable/core/translator/BaseTranslator.java
index 974727a..8a8be87 100644
--- a/core/src/main/java/com/alibaba/testable/translator/BaseTranslator.java
+++ b/core/src/main/java/com/alibaba/testable/core/translator/BaseTranslator.java
@@ -1,4 +1,4 @@
-package com.alibaba.testable.translator;
+package com.alibaba.testable.core.translator;
 
 import com.sun.tools.javac.tree.JCTree.*;
 import com.sun.tools.javac.tree.TreeTranslator;
diff --git a/core/src/main/java/com/alibaba/testable/translator/EnableTestableTranslator.java b/core/src/main/java/com/alibaba/testable/core/translator/EnableTestableTranslator.java
similarity index 95%
rename from core/src/main/java/com/alibaba/testable/translator/EnableTestableTranslator.java
rename to core/src/main/java/com/alibaba/testable/core/translator/EnableTestableTranslator.java
index 9f3811c..4d56311 100644
--- a/core/src/main/java/com/alibaba/testable/translator/EnableTestableTranslator.java
+++ b/core/src/main/java/com/alibaba/testable/core/translator/EnableTestableTranslator.java
@@ -1,10 +1,9 @@
-package com.alibaba.testable.translator;
+package com.alibaba.testable.core.translator;
 
-import com.alibaba.testable.generator.PrivateAccessStatementGenerator;
-import com.alibaba.testable.generator.TestSetupMethodGenerator;
-import com.alibaba.testable.model.TestLibType;
-import com.alibaba.testable.model.TestableContext;
-import com.alibaba.testable.util.ConstPool;
+import com.alibaba.testable.core.generator.PrivateAccessStatementGenerator;
+import com.alibaba.testable.core.generator.TestSetupMethodGenerator;
+import com.alibaba.testable.core.model.TestableContext;
+import com.alibaba.testable.core.util.ConstPool;
 import com.sun.tools.javac.tree.JCTree;
 import com.sun.tools.javac.tree.JCTree.*;
 import com.sun.tools.javac.util.List;
diff --git a/core/src/main/java/com/alibaba/testable/util/ConstPool.java b/core/src/main/java/com/alibaba/testable/core/util/ConstPool.java
similarity index 81%
rename from core/src/main/java/com/alibaba/testable/util/ConstPool.java
rename to core/src/main/java/com/alibaba/testable/core/util/ConstPool.java
index bff9a1c..f46bc1d 100644
--- a/core/src/main/java/com/alibaba/testable/util/ConstPool.java
+++ b/core/src/main/java/com/alibaba/testable/core/util/ConstPool.java
@@ -1,14 +1,10 @@
-package com.alibaba.testable.util;
+package com.alibaba.testable.core.util;
 
 /**
  * @author flin
  */
 public final class ConstPool {
 
-    public static final String NE_PKG = "n";
-    public static final String NE_CLS = "e";
-    public static final String NE_NEW = "w";
-    public static final String NE_FUN = "f";
     public static final String TYPE_UTIL = "com.alibaba.testable.util.TypeUtil";
     public static final String CLASS_SUBSTITUTION = TYPE_UTIL + ".TestableSubstitution";
     public static final String METHOD_ADD_TO_CON_POLL = TYPE_UTIL + ".addToConstructorPool";
diff --git a/core/src/main/java/com/alibaba/testable/util/ResourceUtil.java b/core/src/main/java/com/alibaba/testable/core/util/ResourceUtil.java
similarity index 97%
rename from core/src/main/java/com/alibaba/testable/util/ResourceUtil.java
rename to core/src/main/java/com/alibaba/testable/core/util/ResourceUtil.java
index 6b78951..1c7b8f3 100644
--- a/core/src/main/java/com/alibaba/testable/util/ResourceUtil.java
+++ b/core/src/main/java/com/alibaba/testable/core/util/ResourceUtil.java
@@ -1,4 +1,4 @@
-package com.alibaba.testable.util;
+package com.alibaba.testable.core.util;
 
 import java.io.*;
 
diff --git a/core/src/main/java/com/alibaba/testable/util/StringUtil.java b/core/src/main/java/com/alibaba/testable/core/util/StringUtil.java
similarity index 91%
rename from core/src/main/java/com/alibaba/testable/util/StringUtil.java
rename to core/src/main/java/com/alibaba/testable/core/util/StringUtil.java
index 7e85382..3958f0b 100644
--- a/core/src/main/java/com/alibaba/testable/util/StringUtil.java
+++ b/core/src/main/java/com/alibaba/testable/core/util/StringUtil.java
@@ -1,4 +1,4 @@
-package com.alibaba.testable.util;
+package com.alibaba.testable.core.util;
 
 import java.util.List;
 
diff --git a/core/src/main/java/com/alibaba/testable/util/TestableLogger.java b/core/src/main/java/com/alibaba/testable/core/util/TestableLogger.java
similarity index 93%
rename from core/src/main/java/com/alibaba/testable/util/TestableLogger.java
rename to core/src/main/java/com/alibaba/testable/core/util/TestableLogger.java
index aab042e..aac6273 100644
--- a/core/src/main/java/com/alibaba/testable/util/TestableLogger.java
+++ b/core/src/main/java/com/alibaba/testable/core/util/TestableLogger.java
@@ -1,4 +1,4 @@
-package com.alibaba.testable.util;
+package com.alibaba.testable.core.util;
 
 import javax.annotation.processing.Messager;
 import javax.tools.Diagnostic;
diff --git a/core/src/main/java/com/alibaba/testable/util/TypeUtil.java b/core/src/main/java/com/alibaba/testable/core/util/TypeUtil.java
similarity index 99%
rename from core/src/main/java/com/alibaba/testable/util/TypeUtil.java
rename to core/src/main/java/com/alibaba/testable/core/util/TypeUtil.java
index 9cf78fd..dc00692 100644
--- a/core/src/main/java/com/alibaba/testable/util/TypeUtil.java
+++ b/core/src/main/java/com/alibaba/testable/core/util/TypeUtil.java
@@ -1,4 +1,4 @@
-package com.alibaba.testable.util;
+package com.alibaba.testable.core.util;
 
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Method;
diff --git a/core/src/main/java/com/alibaba/testable/model/TestLibType.java b/core/src/main/java/com/alibaba/testable/model/TestLibType.java
deleted file mode 100644
index 2541908..0000000
--- a/core/src/main/java/com/alibaba/testable/model/TestLibType.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package com.alibaba.testable.model;
-
-/**
- * @author flin
- */
-
-public enum TestLibType {
-    JUnit4,
-    JUnit5
-}
diff --git a/core/src/main/java/n/e.java b/core/src/main/java/n/e.java
index d4d6dfa..cee93cc 100644
--- a/core/src/main/java/n/e.java
+++ b/core/src/main/java/n/e.java
@@ -1,7 +1,7 @@
 package n;
 
-import static com.alibaba.testable.util.TypeUtil.wrapCall;
-import static com.alibaba.testable.util.TypeUtil.wrapNew;
+import static com.alibaba.testable.core.util.TypeUtil.wrapCall;
+import static com.alibaba.testable.core.util.TypeUtil.wrapNew;
 
 public final class e {
 
diff --git a/core/src/main/resources/META-INF/services/javax.annotation.processing.Processor b/core/src/main/resources/META-INF/services/javax.annotation.processing.Processor
index 5f11897..35df998 100644
--- a/core/src/main/resources/META-INF/services/javax.annotation.processing.Processor
+++ b/core/src/main/resources/META-INF/services/javax.annotation.processing.Processor
@@ -1 +1 @@
-com.alibaba.testable.processor.EnableTestableProcessor
+com.alibaba.testable.core.processor.EnableTestableProcessor