diff --git a/4g.md b/4g.md
index 4e768b5..4aad608 100644
--- a/4g.md
+++ b/4g.md
@@ -1 +1,13 @@
-# 
\ No newline at end of file
+# 
+
+* AT+QMTOPEN=0,"base.codestudios.cn",1883
+* AT+QMTCLOSE=0
+
+* AT+QMTCONN=0,"BC20"
+* AT+QMTDISC=0
+
+* AT+QMTSUB=0,0,"demo",0
+* AT+QMTUNS=0,"demo"
+
+* AT+QMTPUBEX=0,0,0,0,"4g",4
+* ABCD
\ No newline at end of file