diff --git a/spring-cloud-tencent-examples/polaris-router-example/router-callee-service1/src/main/java/com/tencent/cloud/polaris/router/example/RouterCalleeController.java b/spring-cloud-tencent-examples/polaris-router-example/router-callee-service1/src/main/java/com/tencent/cloud/polaris/router/example/RouterCalleeController.java
index 925031a7b..8ba495172 100644
--- a/spring-cloud-tencent-examples/polaris-router-example/router-callee-service1/src/main/java/com/tencent/cloud/polaris/router/example/RouterCalleeController.java
+++ b/spring-cloud-tencent-examples/polaris-router-example/router-callee-service1/src/main/java/com/tencent/cloud/polaris/router/example/RouterCalleeController.java
@@ -43,6 +43,9 @@ public class RouterCalleeController {
 
 	/**
 	 * Get information of callee.
+	 *
+	 * @param name name
+	 * @param user user
 	 * @return information of callee
 	 */
 	@PostMapping("/info")
diff --git a/spring-cloud-tencent-examples/polaris-router-example/router-callee-service2/src/main/java/com/tencent/cloud/polaris/router/example/RouterCalleeController.java b/spring-cloud-tencent-examples/polaris-router-example/router-callee-service2/src/main/java/com/tencent/cloud/polaris/router/example/RouterCalleeController.java
index b3e365ab8..775a6362c 100644
--- a/spring-cloud-tencent-examples/polaris-router-example/router-callee-service2/src/main/java/com/tencent/cloud/polaris/router/example/RouterCalleeController.java
+++ b/spring-cloud-tencent-examples/polaris-router-example/router-callee-service2/src/main/java/com/tencent/cloud/polaris/router/example/RouterCalleeController.java
@@ -44,6 +44,9 @@ public class RouterCalleeController {
 
 	/**
 	 * Get information of callee.
+	 *
+	 * @param name name
+	 * @param user user
 	 * @return information of callee
 	 */
 	@PostMapping("/info")
diff --git a/spring-cloud-tencent-examples/polaris-router-example/router-caller-service/src/main/java/com/tencent/cloud/polaris/router/example/CustomRouterLabelResolver.java b/spring-cloud-tencent-examples/polaris-router-example/router-caller-service/src/main/java/com/tencent/cloud/polaris/router/example/CustomRouterLabelResolver.java
index 815b2baff..b649eeec9 100644
--- a/spring-cloud-tencent-examples/polaris-router-example/router-caller-service/src/main/java/com/tencent/cloud/polaris/router/example/CustomRouterLabelResolver.java
+++ b/spring-cloud-tencent-examples/polaris-router-example/router-caller-service/src/main/java/com/tencent/cloud/polaris/router/example/CustomRouterLabelResolver.java
@@ -18,6 +18,7 @@
 
 package com.tencent.cloud.polaris.router.example;
 
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -27,12 +28,12 @@ import feign.RequestTemplate;
 
 import org.springframework.http.HttpRequest;
 import org.springframework.stereotype.Component;
+import org.springframework.web.server.ServerWebExchange;
 
 /**
+ * Customize the business tag information obtained from the request.
  *
- * Customize the business tag information obtained from the request
- *
- *@author lepdou 2022-05-12
+ * @author lepdou 2022-05-12
  */
 @Component
 public class CustomRouterLabelResolver implements RouterLabelResolver {
@@ -58,6 +59,10 @@ public class CustomRouterLabelResolver implements RouterLabelResolver {
 		return labels;
 	}
 
+	@Override
+	public Map<String, String> resolve(ServerWebExchange exchange) {
+		return Collections.emptyMap();
+	}
 
 	@Override
 	public int getOrder() {
diff --git a/spring-cloud-tencent-examples/polaris-router-example/router-caller-service/src/main/java/com/tencent/cloud/polaris/router/example/RouterCallerController.java b/spring-cloud-tencent-examples/polaris-router-example/router-caller-service/src/main/java/com/tencent/cloud/polaris/router/example/RouterCallerController.java
index 866069d24..59f022f38 100644
--- a/spring-cloud-tencent-examples/polaris-router-example/router-caller-service/src/main/java/com/tencent/cloud/polaris/router/example/RouterCallerController.java
+++ b/spring-cloud-tencent-examples/polaris-router-example/router-caller-service/src/main/java/com/tencent/cloud/polaris/router/example/RouterCallerController.java
@@ -42,6 +42,8 @@ public class RouterCallerController {
 
 	/**
 	 * Get info of two value.
+	 *
+	 * @param name name
 	 * @return info
 	 */
 	@GetMapping("/feign")
@@ -54,6 +56,8 @@ public class RouterCallerController {
 
 	/**
 	 * Get information of callee.
+	 *
+	 * @param name name
 	 * @return information of callee
 	 */
 	@GetMapping("/rest")
@@ -67,6 +71,7 @@ public class RouterCallerController {
 
 	/**
 	 * health check.
+	 *
 	 * @return health check info
 	 */
 	@GetMapping("/healthCheck")
diff --git a/spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-gateway/src/main/java/com/tencent/cloud/polaris/router/grayrelease/gateway/GatewayController.java b/spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-gateway/src/main/java/com/tencent/cloud/polaris/router/grayrelease/gateway/GatewayController.java
index cee5a465c..bf5cff323 100644
--- a/spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-gateway/src/main/java/com/tencent/cloud/polaris/router/grayrelease/gateway/GatewayController.java
+++ b/spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-gateway/src/main/java/com/tencent/cloud/polaris/router/grayrelease/gateway/GatewayController.java
@@ -37,6 +37,8 @@ public class GatewayController {
 
 	/**
 	 * Get information of callee.
+	 *
+	 * @param userId userId
 	 * @return information of callee
 	 */
 	@GetMapping("/route_rule")