diff --git a/kunlun.py b/kunlun.py
index 735c3ea..fb85071 100644
--- a/kunlun.py
+++ b/kunlun.py
@@ -27,6 +27,10 @@ from bin.factory_mode import ftm_handle
 def init_send(s_port:serial.Serial, send_str:str):
     s_info = bytearray()
     send_str=send_str.encode('utf-8')
+    key_words={
+        b"WQKL":b"Recieving RAM-IMAGE in xmodem : C",
+        b"HZPG":b"waiting recieve image: C"
+    }
     while True:
         s_port.write(send_str)
         time.sleep(0.1)
@@ -34,7 +38,7 @@ def init_send(s_port:serial.Serial, send_str:str):
         bytes2read = s_port.in_waiting
         tmp = s_port.read(bytes2read)
         s_info += tmp
-        if(s_info.find(b"Recieving RAM-IMAGE in xmodem : C")>=0):
+        if(s_info.find(key_words[send_str])>=0):
             m_ram=True
         else:
             m_ram=False
@@ -375,6 +379,8 @@ def global_def():
         if(args.kunlun_version is None):
             print("请指定参数 -k")
             sys.exit(-1)
+        elif(args.kunlun_version == "4"):
+            init_str="HZPG"
         if(args.upload_key is not None):
             upload_key = args.upload_key
         else: