diff --git a/docs/cn/RocketMQ_Example.md b/docs/cn/RocketMQ_Example.md
index 5728ed4f47791d0a7561bda67eddbe57ae246c9a..f45221f99fd5016154501b1b0851b245c45dfa1b 100644
--- a/docs/cn/RocketMQ_Example.md
+++ b/docs/cn/RocketMQ_Example.md
@@ -38,8 +38,8 @@ public class SyncProducer {
     	// 启动Producer实例
         producer.start();
     	for (int i = 0; i < 100; i++) {
-            // 创建消息，并指定Topic，Tag和消息体
-        	Message msg = new Message("TopicTest" /* Topic */,
+    	    // 创建消息，并指定Topic，Tag和消息体
+    	    Message msg = new Message("TopicTest" /* Topic */,
         	"TagA" /* Tag */,
         	("Hello RocketMQ " + i).getBytes(RemotingHelper.DEFAULT_CHARSET) /* Message body */
         	);