diff --git a/kernel_liteos_a-master/testsuites/unittest/process/plimits/smoke/It_process_plimits_008.cpp b/kernel_liteos_a-master/testsuites/unittest/process/plimits/smoke/It_process_plimits_008.cpp
index 3c4fcf6..4fd7f26 100644
--- a/kernel_liteos_a-master/testsuites/unittest/process/plimits/smoke/It_process_plimits_008.cpp
+++ b/kernel_liteos_a-master/testsuites/unittest/process/plimits/smoke/It_process_plimits_008.cpp
@@ -38,13 +38,14 @@
 #include <cstring>
 #include "It_process_plimits.h"
 
+//write function to get process file mode
 static std::string GetFileMode(const char* filePath)
 {
     const int MODE_COUNT = 11;
     char fileProperty[MODE_COUNT] = "----------";
     char fileMode[MODE_COUNT] = "-rwxrwxrwx";
     struct stat buf;
-    stat(filePath, &buf);
+    stat(filePath, &buf);//get state of the file
     unsigned int off = 256;
     const int LOOP_VARY = 10;
     for (int i = 1; i < LOOP_VARY; i++) {
@@ -55,6 +56,7 @@ static std::string GetFileMode(const char* filePath)
     return fileProperty;
 }
 
+//check the Property
 static int IsFilePropertyR1(const char* filePath)
 {
     std::string fileOrg = "-r--r--r--";
@@ -64,6 +66,7 @@ static int IsFilePropertyR1(const char* filePath)
 
 void ItProcessPlimits008(void)
 {
+	//define process function ID 
     std::string filePath = "/proc/plimits/";
     std::vector<std::string> fileName;
     fileName.push_back("plimits.procs");
@@ -86,3 +89,12 @@ void ItProcessPlimits008(void)
 
     return;
 }
+
+
+/*It is used primarily to verify access to specific files in 
+the /proc/plimit/directory, ensuring that these files are read-only
+*/
+
+
+
+