diff --git a/src/gausskernel/cbb/bbox/gs_bbox.cpp b/src/gausskernel/cbb/bbox/gs_bbox.cpp
index cb208f650..902fffdfd 100644
--- a/src/gausskernel/cbb/bbox/gs_bbox.cpp
+++ b/src/gausskernel/cbb/bbox/gs_bbox.cpp
@@ -277,6 +277,15 @@ void assign_bbox_corepath(const char* newval, void* extra)
         return;
 }
 
+/*
+function name: show_bbox_dump_path
+description: Get the dump file's path.
+arguments: void
+return value: A pointer of type const char*, directing the path to dump or NULL.
+note: none
+date: 2022/8/4
+contact tel: 18720816902
+*/
 const char* show_bbox_dump_path(void)
 {
     const char* path = g_bbox_dump_path;
@@ -284,6 +293,15 @@ const char* show_bbox_dump_path(void)
     return (path != NULL) ? path : "";
 }
 
+/*
+function name: split_string_into_blacklist
+description: Get all strings been divided into character ',' in source string.
+arguments: A pointer of type const char*, directing the source string.
+return value: A pointer of type static List*.
+note: none
+date: 2022/8/4
+contact tel: 18720816902
+*/
 static List* split_string_into_blacklist(const char* source)
 {
     List *result = NIL;