diff --git a/src/main/java/com/baidu/hugegraph/threadpool/PausableScheduledThreadPool.java b/src/main/java/com/baidu/hugegraph/concurrent/PausableScheduledThreadPool.java
similarity index 65%
rename from src/main/java/com/baidu/hugegraph/threadpool/PausableScheduledThreadPool.java
rename to src/main/java/com/baidu/hugegraph/concurrent/PausableScheduledThreadPool.java
index f3d88905..4a1bcbf3 100644
--- a/src/main/java/com/baidu/hugegraph/threadpool/PausableScheduledThreadPool.java
+++ b/src/main/java/com/baidu/hugegraph/concurrent/PausableScheduledThreadPool.java
@@ -1,23 +1,8 @@
 /*
- * Copyright 2017 HugeGraph Authors
- *
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with this
- * work for additional information regarding copyright ownership. The ASF
- * licenses this file to You under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
+ * Copyright (C) 2021 Baidu, Inc. All Rights Reserved.
  */
 
-package com.baidu.hugegraph.threadpool;
+package com.baidu.hugegraph.concurrent;
 
 import java.util.List;
 import java.util.concurrent.ScheduledThreadPoolExecutor;
diff --git a/src/main/java/com/baidu/hugegraph/util/ExecutorUtil.java b/src/main/java/com/baidu/hugegraph/util/ExecutorUtil.java
index 24b21133..087f8d00 100644
--- a/src/main/java/com/baidu/hugegraph/util/ExecutorUtil.java
+++ b/src/main/java/com/baidu/hugegraph/util/ExecutorUtil.java
@@ -26,7 +26,7 @@
 
 import org.apache.commons.lang3.concurrent.BasicThreadFactory;
 
-import com.baidu.hugegraph.threadpool.PausableScheduledThreadPool;
+import com.baidu.hugegraph.concurrent.PausableScheduledThreadPool;
 
 public final class ExecutorUtil {
 
diff --git a/src/test/java/com/baidu/hugegraph/unit/UnitTestSuite.java b/src/test/java/com/baidu/hugegraph/unit/UnitTestSuite.java
index 8cdf7cb1..8b84932f 100644
--- a/src/test/java/com/baidu/hugegraph/unit/UnitTestSuite.java
+++ b/src/test/java/com/baidu/hugegraph/unit/UnitTestSuite.java
@@ -49,7 +49,7 @@
 import com.baidu.hugegraph.unit.perf.PerfUtilTest;
 import com.baidu.hugegraph.unit.rest.RestClientTest;
 import com.baidu.hugegraph.unit.rest.RestResultTest;
-import com.baidu.hugegraph.unit.threadpool.PausableScheduledThreadPoolTest;
+import com.baidu.hugegraph.unit.concurrent.PausableScheduledThreadPoolTest;
 import com.baidu.hugegraph.unit.util.BytesTest;
 import com.baidu.hugegraph.unit.util.CollectionUtilTest;
 import com.baidu.hugegraph.unit.util.DateUtilTest;
@@ -71,7 +71,6 @@
     AtomicLockTest.class,
     KeyLockTest.class,
     RowLockTest.class,
-
     PausableScheduledThreadPoolTest.class,
 
     HugeConfigTest.class,
diff --git a/src/test/java/com/baidu/hugegraph/unit/threadpool/PausableScheduledThreadPoolTest.java b/src/test/java/com/baidu/hugegraph/unit/concurrent/PausableScheduledThreadPoolTest.java
similarity index 68%
rename from src/test/java/com/baidu/hugegraph/unit/threadpool/PausableScheduledThreadPoolTest.java
rename to src/test/java/com/baidu/hugegraph/unit/concurrent/PausableScheduledThreadPoolTest.java
index 53d29844..c253ba19 100644
--- a/src/test/java/com/baidu/hugegraph/unit/threadpool/PausableScheduledThreadPoolTest.java
+++ b/src/test/java/com/baidu/hugegraph/unit/concurrent/PausableScheduledThreadPoolTest.java
@@ -1,23 +1,8 @@
 /*
- * Copyright 2017 HugeGraph Authors
- *
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with this
- * work for additional information regarding copyright ownership. The ASF
- * licenses this file to You under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
+ * Copyright (C) 2021 Baidu, Inc. All Rights Reserved.
  */
 
-package com.baidu.hugegraph.unit.threadpool;
+package com.baidu.hugegraph.unit.concurrent;
 
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -25,7 +10,7 @@
 import org.junit.Assert;
 import org.junit.Test;
 
-import com.baidu.hugegraph.threadpool.PausableScheduledThreadPool;
+import com.baidu.hugegraph.concurrent.PausableScheduledThreadPool;
 import com.baidu.hugegraph.util.ExecutorUtil;
 
 public class PausableScheduledThreadPoolTest {