diff --git a/4G/4g.c b/4G/4g.c
index 2066e55..2ecb101 100644
--- a/4G/4g.c
+++ b/4G/4g.c
@@ -16,4 +16,9 @@ void sch_4g_get_parameter(char *param)
 void sch_4g_check_error(void)
 {
 	
-}
\ No newline at end of file
+}
+
+void sch_4g_message(void)
+{
+  printf("hello 20200820 \n");	
+}
diff --git a/4G/4g.h b/4G/4g.h
index 10bce04..c8213fa 100644
--- a/4G/4g.h
+++ b/4G/4g.h
@@ -3,4 +3,5 @@
 void sch_4g_init(void);
 void sch_4g_set_parameter(char * param);
 void sch_4g_get_parameter(char *param);
-void sch_4g_check_error(void);
\ No newline at end of file
+void sch_4g_check_error(void);
+void sch_4g_message(void);
\ No newline at end of file
diff --git a/classroom/classroom.c b/classroom/classroom.c
index dd3121b..25fd8e7 100644
--- a/classroom/classroom.c
+++ b/classroom/classroom.c
@@ -7,4 +7,9 @@ void cs_check_remain_classroom(void)
 void cs_book_classroom(void)
 {
 	
+}
+
+void cs_find_classromm()  // 2020-8-20
+{
+	
 }
\ No newline at end of file
diff --git a/classroom/classroom.h b/classroom/classroom.h
index 77a473e..14e17fc 100644
--- a/classroom/classroom.h
+++ b/classroom/classroom.h
@@ -3,4 +3,5 @@
 
 void cs_check_remain_classroom(void);
 void cs_book_classroom(uint16_t classroom);
+void cs_find_classromm();  // 2020-8-20
 #endif
\ No newline at end of file
diff --git a/study/study.c b/study/study.c
index 682ab39..55cab47 100644
--- a/study/study.c
+++ b/study/study.c
@@ -19,4 +19,9 @@ uint8_t study_homework(void)
 uint8_t study_get_temperature(void)
 {
 	return check_temperature();
+}
+
+void study_holiday(void)  // 2020-8-20
+{
+	
 }
\ No newline at end of file
diff --git a/study/study.h b/study/study.h
index b42f029..cc0598d 100644
--- a/study/study.h
+++ b/study/study.h
@@ -4,4 +4,5 @@ void study_set_class(uint8_t class);
 uint8_t study_get_class(void);
 
 uint8_t study_homework(void);
-uint8_t study_get_temperature(void);
\ No newline at end of file
+uint8_t study_get_temperature(void);
+void study_holiday(void);
\ No newline at end of file