diff --git a/chsrc.h b/chsrc.h
index 4719b00..5ecfefe 100644
--- a/chsrc.h
+++ b/chsrc.h
@@ -9,8 +9,7 @@
 *   chsrc.c 头文件
 * -------------------------------------------------------------*/
 
-#include <stdio.h>
-#include "helper.h"
+#include "xy.h"
 
 typedef struct {
   const char* abbr;
diff --git a/helper.h b/xy.h
similarity index 97%
rename from helper.h
rename to xy.h
index f35c4f4..2d734e8 100644
--- a/helper.h
+++ b/xy.h
@@ -1,17 +1,18 @@
 /* --------------------------------------------------------------
-* File          : helper.h
+* File          : xy.h
 * Authors       : Aoran Zeng <ccmywish@qq.com>
 * Created on    : <2023-08-28>
-* Last modified : <2023-08-31>
+* Last modified : <2023-09-03>
 *
-* helper:
+* xy:
 *
-*   helper functions and macros
+*   Xiangyang or Xianyang or something else
 * -------------------------------------------------------------*/
 
 #ifndef XY_H
 #define XY_H
 
+#include <stdio.h>
 #include <stdarg.h>
 #include <string.h>
 #include <stdlib.h>
@@ -63,7 +64,7 @@
   static bool xy_on_bsds    = true;
 
   // set xy_os_devnull
-  
+
   #define xy_useutf8()
 
 #endif