updated Readme (EN) against Chinese updates

Signed-off-by: wusongqing<wusongqing@huawei.com>

README.md

@@ -1,35 +1,53 @@
-# Config Policy
+# Configuration Policy Component
 
 ## Introduction
 
-The config policy, namely, cust, provides APIs for each service module to obtain the configuration directories at different levels or the configuration file paths.
+The configuration policy component, namely, customization_config_policy, provides APIs for each service module to obtain the configuration directories at different levels or the configuration file paths.
+
+## System Architecture
+
+**Figure 1** Architecture of the configuration policy component
+
+![](figures/config_policy_en.png)
+
+The architecture is described as follows:
+
+- **interfaces** provides the path of the file with the highest priority and all-level paths of the specified file.
+- **frameworks** initializes the configuration directory and queries the file path.
 
 ## Directory Structure
 
-The directory structure for the config policy is as follows:
+The code directory structure of the configuration policy component is as follows:
 
 ```
 /base/customization/
-├── config_policy             # Code repository for the config policy
-│   ├── frameworks            # Core code of the config policy
-│   │   ├── config_policy     # config policy
-│   │   │   └── src           # Implementation code
-│   ├── interfaces            # APIs of the config policy
-│   │   ├── inner_api         # APIs of the config policy for internal subsystems
-│   │   └── kits              # JavaScript APIs
-│   └── test                  # Test code
+├── config_policy           # Code repository for the configuration policy component
+│   ├── frameworks          # Core code of the configuration policy component
+│   │   ├── config_policy   # Configuration policy module
+│   │   │   └── src         # Implementation code
+│   ├── interfaces          # APIs of the configuration policy component
+│   │   ├── inner_api       # APIs for internal subsystems
+│   │   └── kits            # JavaScript APIs of the configurationpolicy component
+│   └── test                # Test code
 ```
 
 ## Usage
 
-Call the APIs of the config policy to obtain the configuration directories at different levels or the configuration file paths.
+Call the APIs of the configuration policy component to obtain the configuration directories at different levels or the configuration file paths.
 
 ```
 #include "config_policy_utils.h"
 
-const char *testPathSuffix = "user.xml"; // Set the name of the configuration file.
+CfgDir *cfgDir = GetCfgDirList(); // Obtain the configuration directory list.
+FreeCfgDirList(cfgDir); // Release the memory after the list is obtained.
+
+const char *cfgPath = "etc/xml/cfg.xml"; // Set the relative path and name of the configuration file.
+CfgFiles *cfgFiles = GetCfgFiles(cfgPath); // Obtain the configuration file paths of all configuration levels.
+FreeCfgFiles(cfgFiles); // Release the memory after the information is obtained.
+
+const char *userPath = "etc/xml/user.xml"; // Set the relative path and name of the configuration file.
 char buf[MAX_PATH_LEN] = {0};
-char *filePath = GetOneCfgFile(testPathSuffix, buf, MAX_PATH_LEN); // Obtain the path of the configuration file with the highest priority.
+char *filePath = GetOneCfgFile(userPath, buf, MAX_PATH_LEN); // Obtain the path of the configuration file with the highest priority.
 ```
 
 ## Constraints
@@ -39,4 +57,3 @@ char *filePath = GetOneCfgFile(testPathSuffix, buf, MAX_PATH_LEN); // Obtain the
 ## Repositories Involved
 
 **customization\_config\_policy**
-