update docs

Signed-off-by: NAnnie_wang <annie.wangli@huawei.com>

en/readme/utils.md

-# utils<a name="EN-US_TOPIC_0000001078403148"></a>
+# utils<a name="EN-US_TOPIC_0000001092539399"></a>
+
 
 ## Introduction<a name="section11660541593"></a>
 
-The  **utils**  repository provides ndk_libraries_config and system functions.
+The **utils** repository provides common enhanced APIs for development in C and C++.
+
+**C++**
+
+-   Enhanced APIs for operations related to files, paths, and strings
+-   APIs related to the read-write lock, semaphore, timer, thread, and thread pool
+-   APIs related to the security data container and data serialization
+-   Error codes for each subsystem
+-   Safe functions in C
+
+**C**
+
+-   Hardware Abstraction Layer (HAL) APIs for performing operations on standard files
+-   APIs for internal functions, such as the timer
 
 ## Directory Structure<a name="section17271017133915"></a>
 
 ```
-utils
-├── native               # Utility class implementation at the Native layer
-├── ndk_libraries_config # Configuration of the NDK library
-└── system               # System-related predefined values and security policy configuration
+/utils
+    ├── native                  # Utility class implementation at the native layer
+    └── system                  # System-related predefined values and security policy configuration
 ```
 
-## Usage<a name="section137421544135015"></a>
-
-For details, see the API Reference.
-
 ## Repositories Involved<a name="section1249817110914"></a>
 
-Utils subsystem
+**utils subsystem**
 
-**utils**
+utils
 
-utils\_native
+[utils\_native](https://gitee.com/openharmony/utils_native)
 
 [utils\_native\_lite](https://gitee.com/openharmony/utils_native_lite)
-