diff --git a/4G/4g.c b/4G/4g.c
index 1f384a4..e0c1d3e 100644
--- a/4G/4g.c
+++ b/4G/4g.c
@@ -7,4 +7,29 @@ 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)
+{
+	
+}
+
+void sch_4g_message(void)
+{
+  printf("hello 20200820 \n");	
+}
+
+void sch_4g_memu()
+{
+return 2020.8.22;
+}
+
+
+void sch_20200824_new()
+{
+	
 }
\ No newline at end of file