diff --git a/api/@ohos.process.d.ts b/api/@ohos.process.d.ts
index b3305c41fe84ba32b6ba5d4ffb05eec4d4df3ac1..bff59be60eeaaaa17d6d367ce1d884cca23b7114 100644
--- a/api/@ohos.process.d.ts
+++ b/api/@ohos.process.d.ts
@@ -153,90 +153,6 @@ declare namespace process {
     */
     readonly getPpid: number;
 
-    /** 
-     * Returns the tid of the current thread.
-     * @since 7
-     * @sysCap SystemCapability.CCRuntime
-     * @return return the tid of the current thread.
-     */
-    function getTid(): number;
-
-    /** 
-     * Returns a boolean whether the process is isolated.
-     * @since 7
-     * @sysCap SystemCapability.CCRuntime
-     * @return return boolean whether the process is isolated.
-     */
-    function isIsolatedProcess(): boolean;
-
-    /** 
-     * Returns a boolean whether the specified uid belongs to a particular application.
-     * @since 7
-     * @sysCap SystemCapability.CCRuntime
-     * @param v An id.
-     * @return return a boolean whether the specified uid belongs to a particular application.
-     */
-    function isAppUid(v: number): boolean;
-
-    /** 
-     * Returns a boolean whether the process is running in a 64-bit environment.
-     * @since 7
-     * @sysCap SystemCapability.CCRuntime
-     * @return return a boolean whether the process is running in a 64-bit environment.
-     */
-    function is64Bit(): boolean;
-
-    /** 
-     * Returns the uid based on the specified user name.
-     * @since 7
-     * @sysCap SystemCapability.CCRuntime
-     * @param v Process name.
-     * @return return the uid based on the specified user name.
-     */
-    function getUidForName(v: string): number;
-
-    /** 
-     * Returns the thread priority based on the specified tid.
-     * @since 7
-     * @sysCap SystemCapability.CCRuntime
-     * @param v The tid of the process.
-     * @return Return the thread priority based on the specified tid.
-     */
-    function getThreadPriority(v: number): number;
-
-    /** 
-     * Returns the elapsed real time (in milliseconds) taken from the start of the system to the start of the process.
-     * @since 7
-     * @sysCap SystemCapability.CCRuntime
-     * @return Return the start of the system to the start of the process.
-     */
-    function getStartRealtime(): number;
-
-    /** 
-     * Returns cpu cores available for the current process on a multi-core device.
-     * @since 7
-     * @sysCap SystemCapability.CCRuntime
-     * @return Return cpu cores available for the current process on a multi-core device.
-     */
-    function getAvailableCores​(): number[];
-
-    /** 
-     * Returns the cpu time (in milliseconds) from the time when the process starts to the current time.
-     * @since 7
-     * @sysCap SystemCapability.CCRuntime
-     * @return Return the cpu time (in milliseconds) from the time when the process starts to the current time.
-     */
-    function getPastCpuTime(): number;
-
-    /** 
-     * Returns the system configuration at runtime.
-     * @since 7
-     * @sysCap SystemCapability.CCRuntime
-     * @param name Parameters defined by the system configuration.
-     * @return Return the system configuration at runtime.
-     */
-    function getSystemConfig(name: number): number;
-
     type EventListener = (evt: Object) => void;
     /**
     * Return a child process object and spawns a new ChildProcess to run the command
diff --git a/api/@ohos.util.d.ts b/api/@ohos.util.d.ts
index 04ea18e76bbb86ba1e394bed6fa030d895c9e818..9841a835ce7312e8322fad272473b0aeffcedff3 100644
--- a/api/@ohos.util.d.ts
+++ b/api/@ohos.util.d.ts
@@ -108,10 +108,6 @@ declare namespace util {
             options?: { fatal?: boolean; ignoreBOM?: boolean },
         );
 
-        constructor(
-            encoding?: string,
-            options?: { fatal?: boolean; ignoreBOM?: boolean },
-        );
         /**
          * Returns the result of running encoding's decoder.
          * @since 7