diff --git a/common/src/main/java/org/apache/rocketmq/common/help/FAQUrl.java b/common/src/main/java/org/apache/rocketmq/common/help/FAQUrl.java
index 4a6588e4124..7154b3f169f 100644
--- a/common/src/main/java/org/apache/rocketmq/common/help/FAQUrl.java
+++ b/common/src/main/java/org/apache/rocketmq/common/help/FAQUrl.java
@@ -18,32 +18,34 @@
 
 public class FAQUrl {
 
-    public static final String APPLY_TOPIC_URL = "https://rocketmq.apache.org/docs/bestPractice/06FAQ";
+    public static final String DEFAULT_FAQ_URL = "https://rocketmq.apache.org/docs/bestPractice/06FAQ";
 
-    public static final String NAME_SERVER_ADDR_NOT_EXIST_URL = "https://rocketmq.apache.org/docs/bestPractice/06FAQ";
+    public static final String APPLY_TOPIC_URL = DEFAULT_FAQ_URL;
 
-    public static final String GROUP_NAME_DUPLICATE_URL = "https://rocketmq.apache.org/docs/bestPractice/06FAQ";
+    public static final String NAME_SERVER_ADDR_NOT_EXIST_URL = DEFAULT_FAQ_URL;
 
-    public static final String CLIENT_PARAMETER_CHECK_URL = "https://rocketmq.apache.org/docs/bestPractice/06FAQ";
+    public static final String GROUP_NAME_DUPLICATE_URL = DEFAULT_FAQ_URL;
 
-    public static final String SUBSCRIPTION_GROUP_NOT_EXIST = "https://rocketmq.apache.org/docs/bestPractice/06FAQ";
+    public static final String CLIENT_PARAMETER_CHECK_URL = DEFAULT_FAQ_URL;
 
-    public static final String CLIENT_SERVICE_NOT_OK = "https://rocketmq.apache.org/docs/bestPractice/06FAQ";
+    public static final String SUBSCRIPTION_GROUP_NOT_EXIST = DEFAULT_FAQ_URL;
+
+    public static final String CLIENT_SERVICE_NOT_OK = DEFAULT_FAQ_URL;
 
     // FAQ: No route info of this topic, TopicABC
-    public static final String NO_TOPIC_ROUTE_INFO = "https://rocketmq.apache.org/docs/bestPractice/06FAQ";
+    public static final String NO_TOPIC_ROUTE_INFO = DEFAULT_FAQ_URL;
 
-    public static final String LOAD_JSON_EXCEPTION = "https://rocketmq.apache.org/docs/bestPractice/06FAQ";
+    public static final String LOAD_JSON_EXCEPTION = DEFAULT_FAQ_URL;
 
-    public static final String SAME_GROUP_DIFFERENT_TOPIC = "https://rocketmq.apache.org/docs/bestPractice/06FAQ";
+    public static final String SAME_GROUP_DIFFERENT_TOPIC = DEFAULT_FAQ_URL;
 
-    public static final String MQLIST_NOT_EXIST = "https://rocketmq.apache.org/docs/bestPractice/06FAQ";
+    public static final String MQLIST_NOT_EXIST = DEFAULT_FAQ_URL;
 
-    public static final String UNEXPECTED_EXCEPTION_URL = "https://rocketmq.apache.org/docs/bestPractice/06FAQ";
+    public static final String UNEXPECTED_EXCEPTION_URL = DEFAULT_FAQ_URL;
 
-    public static final String SEND_MSG_FAILED = "https://rocketmq.apache.org/docs/bestPractice/06FAQ";
+    public static final String SEND_MSG_FAILED = DEFAULT_FAQ_URL;
 
-    public static final String UNKNOWN_HOST_EXCEPTION = "https://rocketmq.apache.org/docs/bestPractice/06FAQ";
+    public static final String UNKNOWN_HOST_EXCEPTION = DEFAULT_FAQ_URL;
 
     private static final String TIP_STRING_BEGIN = "\nSee ";
     private static final String TIP_STRING_END = " for further details.";
diff --git a/common/src/test/java/org/apache/rocketmq/common/help/FAQUrlTest.java b/common/src/test/java/org/apache/rocketmq/common/help/FAQUrlTest.java
new file mode 100644
index 00000000000..f7d0603ce2b
--- /dev/null
+++ b/common/src/test/java/org/apache/rocketmq/common/help/FAQUrlTest.java
@@ -0,0 +1,42 @@
+/*
+ * 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.
+ */
+
+package org.apache.rocketmq.common.help;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class FAQUrlTest {
+
+    @Test
+    public void testSuggestTodo() {
+        String expected = "\nSee " + FAQUrl.DEFAULT_FAQ_URL + " for further details.";
+        String actual = FAQUrl.suggestTodo(FAQUrl.DEFAULT_FAQ_URL);
+        assertEquals(expected, actual);
+    }
+
+    @Test
+    public void testAttachDefaultURL() {
+        String errorMsg = "errorMsg";
+        String expected = errorMsg
+                + "\nFor more information, please visit the url, "
+                + FAQUrl.UNEXPECTED_EXCEPTION_URL;
+        String actual = FAQUrl.attachDefaultURL(errorMsg);
+        assertEquals(expected, actual);
+    }
+}