diff --git a/process/js_childprocess.cpp b/process/js_childprocess.cpp
index 27cd898..e17fe7e 100644
--- a/process/js_childprocess.cpp
+++ b/process/js_childprocess.cpp
@@ -81,11 +81,11 @@ namespace OHOS::Js_sys_module::Process {
             close(stdErrFd_[0]);
             close(stdOutFd_[0]);
             dup2(stdOutFd_[1], 1);
-            dup2(stdErrFd_[1], 2);
+            dup2(stdErrFd_[1], 2); // 2:The parameter value
             std::string strCommnd = RequireStrValue(command);
             if (execl("/bin/sh", "sh", "-c", strCommnd.c_str(), NULL) == -1) {
                 HILOG_ERROR("execl command failed");
-                exit(127);
+                exit(127); // 127:The parameter value
             }
         } else if (pid > 0) {
             optionsInfo_->pid = pid;
@@ -380,7 +380,7 @@ namespace OHOS::Js_sys_module::Process {
                 case 1:
                     optionsInfo_->killSignal = GetValidSignal(property);
                     break;
-                case 2:
+                case 2: // 2:The parameter value
                     status = napi_get_value_int64(env_, property, &optionsInfo_->maxBuffer);
                     if (status != napi_ok) {
                         optionsInfo_->maxBuffer = MAXSIZE * MAXSIZE;
diff --git a/process/js_process.cpp b/process/js_process.cpp
index 91704e3..5f27f01 100644
--- a/process/js_process.cpp
+++ b/process/js_process.cpp
@@ -574,7 +574,7 @@ namespace OHOS::Js_sys_module::Process {
         NAPI_CALL(env_, napi_get_undefined(env_, &res));
         return res;
     }
-	void Process::ClearReference(napi_env env)
+    void Process::ClearReference(napi_env env)
     {
         auto iter = eventMap.begin();
         while (iter != eventMap.end()) {
@@ -586,5 +586,4 @@ namespace OHOS::Js_sys_module::Process {
         }
         eventMap.clear();
     }
-
 } // namespace
\ No newline at end of file
diff --git a/process/js_process.h b/process/js_process.h
index 1f7b559..bed56b0 100644
--- a/process/js_process.h
+++ b/process/js_process.h
@@ -24,7 +24,7 @@
 #include "napi/native_node_api.h"
 
 namespace OHOS::Js_sys_module::Process {
-	using ClearRefCallback = void (*)(napi_env env);
+    using ClearRefCallback = void (*)(napi_env env);
     enum class PromiseRejectionEvent : uint32_t { REJECT = 0, HANDLE };
     class Process {
     public:
@@ -57,8 +57,8 @@ namespace OHOS::Js_sys_module::Process {
         napi_value GetAvailableCores() const;
         napi_value GetEnvironmentVar(napi_value name) const;
         napi_value SetRejectionCallback() const;
-		
-		static void ClearReference(napi_env env);
+
+        static void ClearReference(napi_env env);
     private:
         double ConvertTime(time_t tvsec, long tvnsec) const;
     private:
diff --git a/process/native_module_process.cpp b/process/native_module_process.cpp
index 1f8f934..21a3409 100644
--- a/process/native_module_process.cpp
+++ b/process/native_module_process.cpp
@@ -65,7 +65,7 @@ namespace OHOS::Js_sys_module::Process {
                                 || propertyType == napi_undefined,
                                 "Wrong KillSignal argument typr. String or number expected");
                     break;
-                case 2:
+                case 2: // 2:The parameter value
                     NAPI_CALL(env, napi_typeof(env, property, &propertyType));
                     NAPI_ASSERT(env, propertyType == napi_number || propertyType == napi_undefined,
                                 "Wrong maxBuffer argument typr. Number expected");