diff --git a/22_day/Makefile b/22_day/Makefile
index 4f9d08d..a0f187d 100644
--- a/22_day/Makefile
+++ b/22_day/Makefile
@@ -67,6 +67,13 @@ hello3.bim : hello3.obj a_nask.obj Makefile
 hello3.hrb : hello3.bim Makefile
 	$(BIM2HRB) hello3.bim hello3.hrb 0
 
+hello4.bim : hello4.obj a_nask.obj Makefile
+	$(OBJ2BIM) @$(RULEFILE) out:hello4.bim stack:1k map:hello4.map \
+		hello4.obj a_nask.obj
+
+hello4.hrb : hello4.bim Makefile
+	$(BIM2HRB) hello4.bim hello4.hrb 0
+
 bug1.bim : bug1.obj Makefile
 	$(OBJ2BIM) @$(RULEFILE) out:bug1.bim map:bug1.map bug1.obj a_nask.obj
 
@@ -86,7 +93,8 @@ bug3.hrb : bug3.bim Makefile
 	$(BIM2HRB) bug3.bim bug3.hrb 0
 
 haribote.img : ipl10.bin haribote.sys Makefile \
-		hello.hrb hello2.hrb a.hrb hello3.hrb bug1.hrb bug2.hrb bug3.hrb
+		hello.hrb hello2.hrb a.hrb hello3.hrb bug1.hrb bug2.hrb bug3.hrb \
+		hello4.hrb
 	$(EDIMG)   imgin:../z_tools/fdimg0at.tek \
 		wbinimg src:ipl10.bin len:512 from:0 to:0 \
 		copy from:haribote.sys to:@: \
@@ -99,6 +107,7 @@ haribote.img : ipl10.bin haribote.sys Makefile \
 		copy from:bug1.hrb to:@: \
 		copy from:bug2.hrb to:@: \
 		copy from:bug3.hrb to:@: \
+		copy from:hello4.hrb to:@: \
 		imgout:haribote.img
 
 # 其他指令
diff --git a/22_day/a_nask.nas b/22_day/a_nask.nas
index 28b00f5..7a71f20 100644
--- a/22_day/a_nask.nas
+++ b/22_day/a_nask.nas
@@ -4,6 +4,7 @@
 [FILE "a_nask.nas"]		; 源文件名信息
 
 		GLOBAL	_api_putchar
+		GLOBAL	_api_putstr0
 		GLOBAL	_api_end
 
 [SECTION .text]
@@ -13,6 +14,15 @@ _api_putchar:	; void api_putchar(int c);
 		MOV		AL,[ESP+4]		; c
 		INT		0x40
 		RET
+
+_api_putstr0:	; void api_putstr0(char *s);
+		PUSH	EBX
+		MOV		EDX,2
+		MOV		EBX,[ESP+8]		; s
+		INT		0x40
+		POP		EBX
+		RET
+
 _api_end: ; void api_end(void); 
 		MOV			EDX,4
 		INT			0x40
diff --git a/22_day/hello4.c b/22_day/hello4.c
new file mode 100644
index 0000000..269cb9d
--- /dev/null
+++ b/22_day/hello4.c
@@ -0,0 +1,8 @@
+void api_putstr0(int c);
+void api_end(void);
+
+void HariMain(void)
+{
+	api_putstr0('hello, world\n');
+	api_end();
+}