diff --git a/src/include/access/archive/nas_am.h b/src/include/access/archive/nas_am.h
index 88887239e..10f77c1b8 100644
--- a/src/include/access/archive/nas_am.h
+++ b/src/include/access/archive/nas_am.h
@@ -23,6 +23,11 @@
  * ---------------------------------------------------------------------------------------
  */
 
+/*
+Network Attached Storage (NAS), the name of a special data storage technology, 
+can be directly connected to the computer network, 
+providing centralized data access services for heterogeneous network users*/
+
 #ifndef NAS_AM_H
 #define NAS_AM_H