docs:update docs

README-zh.md

@@ -15,7 +15,7 @@ Spring Cloud Tencent包含了分布式应用微服务开发过程中所需的组
 * **服务注册与发现**：基于 Spring Cloud Common的标准进行微服务的注册与发现。
 * **服务路由与负载均衡**：基于 Ribbon 的接口标准，提供场景更丰富的动态路由以及负载均衡的能力。
 * **故障节点熔断**：提供故障节点的熔断剔除以及主/被动探测恢复的能力，保证分布式服务的可靠性。
-* **服务限流**：支持工作于微服务被调接入层的限流功能，保证后台微服务稳定性，可通过控制台动态配置规则，及查看流量监控数据。
+* **服务限流**：支持微服务被调接入层和网关主动调用的限流功能，保证后台微服务稳定性，可通过控制台动态配置规则，及查看流量监控数据。
 * **元数据传递**：支持网关和微服务之间的元数据传递。
 
 ## 组件

README.md

@@ -15,8 +15,8 @@ Based on Spring Cloud Tencent, you only need a small configuration to launch Spr
 
 * **Service Registration and Discovery**: Based on Spring Cloud's discovery and registration standard.
 * **Service Routing and LoadBalancer**: Based on ribbon's API port, provide dynamic routing and load balancing use cases.
-* **CircuitBreaker Node**: Support circuitbreak's auto-reset ability, ensure the reliability of distributed server
-* **Rate Limiter**: Support rate limit between microservice and access layer, ensure the stability of backend, one can configure policies and traffic data from the control panel
+* **CircuitBreaker Node**: Support circuitbreaker auto-reset ability, ensure the reliability of distributed server
+* **Rate Limiter**: Support rate limit of microservice and gateway, ensure the stability of backend, one can configure policies and traffic data from the control panel
 * **Metadata Delivery**: Support metadata delivery between gateways and microservices.
 
 ## Components

spring-cloud-tencent-docs/src/main/doc-zh/spring-cloud-tencent-polaris-gateway.md

@@ -11,6 +11,10 @@
 
 支持网关和微服务之间的元数据传递。
 
+### 网关限流
+
+支持网关转发对应微服务过程的服务限流。
+
 ## 快速入门
 
 本章节将介绍如何最简单地在Spring Cloud项目中使用Spring Cloud Tencent Polaris Gateway的功能。
@@ -33,3 +37,7 @@
 ### 元数据传递
 
 其依赖的是```spring-cloud-tencent-metadata```模块的功能，因此使用上参考[Spring Cloud Tencent Metadata](spring-cloud-tencent-metadata.md)即可。
+
+### 网关限流
+
+其依赖的是```spring-cloud-starter-tencent-polaris-ratelimit```模块的功能，因此使用上参考[Polaris RateLimit](spring-cloud-tencent-polaris-ratelimit.md)即可。

spring-cloud-tencent-docs/src/main/doc/spring-cloud-tencent-polaris-gateway.md

@@ -12,6 +12,10 @@ You can use Polaris's extension microservice gateway features by importing depen
 
 Support metadata delivery between gateways and microservices.
 
+### Gateway RateLimit
+
+Support rate limit of gateway routing to the corresponding micro-service.
+
 ## User Guide
 
 This chapter will explain how to use Spring Cloud Tencent Polaris Gateway's features in the Spring Cloud project. 
@@ -29,4 +33,15 @@ For example, in Maven's project, add listed configurations in pom:
 </dependency>
 ```
 
-2. For further instructions, please refer to  [Polaris Gateway Example](../../../../spring-cloud-tencent-examples/polaris-gateway-example/README.md)。.
+2. For further instructions, please refer to  [Polaris Gateway Example](../../../../spring-cloud-tencent-examples/polaris-gateway-example/README.md).
+
+## Feature Usage
+
+### Metadata Delivery
+
+Because making use of ```spring-cloud-tencent-metadata```, please refer to [Spring Cloud Tencent Metadata](spring-cloud-tencent-metadata.md).
+
+### Gateway RateLimit
+
+Because making use of ```spring-cloud-starter-tencent-polaris-ratelimit```, please refer to [Spring Cloud Tencent Metadata](spring-cloud-tencent-polaris-ratelimit.md).
+

spring-cloud-tencent-examples/polaris-gateway-example/README-zh.md

@@ -75,3 +75,6 @@ curl -L -X GET 'http://localhost:48083/GatewayCalleeService/gateway/example/call
 {"a":"1","b":2}
 ```
 
+#### 网关限流
+
+参考[Polaris RateLimit Example](../polaris-ratelimit-example/README-zh.md)

spring-cloud-tencent-examples/polaris-gateway-example/README.md

@@ -75,3 +75,7 @@ Expected return rate
 {"a":"1","b":2}
 ```
 
+#### Gateway Rate Limit
+
+See [Polaris RateLimit Example](../polaris-ratelimit-example/README.md)
+