doc: improve context doc (#722)

content/en/docs/hertz/tutorials/basic-feature/context/_index.md

@@ -7,24 +7,22 @@ description: >
 
 Request Context `RequestContext` is a context used to save HTTP requests and set HTTP responses. It provides many convenient API interfaces to help users develop.
 
-## Context Passing and Concurrency Security
-
-### Description
-
-Hertz provides both a standard `context.Context` and a requestContext as input parameters for the `HandlerFunc` design. Function signature is:
+Hertz provides both a standard `context.Context` and a `RequestContext` as input parameters for the `HandlerFunc` design. Function signature is:
 
 ```go
 type HandlerFunc func(c context.Context, ctx *RequestContext)
 ```
 
+## Context Passing and Concurrency Security
+
 ### Metadata Storage
 
 Both contexts have the ability to store values, and there is a simple basis for choosing which context to use: the lifecycle of the stored value and the chosen context should match.
-
-#### Details
 
 `ctx` is mainly used to store request level variables, which are reclaimed upon completion of the request. It's characteristics are high query efficiency (with the underlying `map`), unsafe coroutines, and no implementation of the `context.Context` interface.
 
-`c` is passed as a context between middleware `/handler`. Having all the semantics of `context.Context`, coroutine security. For all places that require the `context.Context` interface as input parameters, simply pass `c` directly.
+`c` is passed as a context between middleware `/handler`. it is coroutine security. For all places that require the `context.Context` interface as input parameters, simply pass `c` directly.
+
+### concurrent security
 
-In addition, if there is a scenario of asynchronous transmission of `ctx`, hertz also provides the `ctx.Copy()` interface, making it easy for businesses to obtain a secure copy of the protocol.
+In addition, if there are scenarios where `ctx` is passed asynchronously or used concurrently, hertz also provides the `ctx.Copy()` interface, which makes it easy for the business to get a coprocess-safe copy.