diff --git a/check_proxy.py b/check_proxy.py
index ab17886..4f8f5a1 100644
--- a/check_proxy.py
+++ b/check_proxy.py
@@ -21,10 +21,6 @@ def check_proxy(proxies):
 
 
 if __name__ == '__main__':
-    import os
-    if os.path.exists('config_private.py'):
-        # 放自己的秘密如API和代理网址
-        from config_private import proxies
-    else:
-        from config import proxies
+    try: from config_private import proxies # 放自己的秘密如API和代理网址 os.path.exists('config_private.py')
+    except: from config import proxies
     check_proxy(proxies)
\ No newline at end of file
diff --git a/main.py b/main.py
index 71eff2f..3d9c83a 100644
--- a/main.py
+++ b/main.py
@@ -3,7 +3,9 @@ import os
 import markdown, mdtex2html
 from predict import predict
 from show_math import convert as convert_math
-from config import proxies, WEB_PORT
+
+try: from config_private import proxies, WEB_PORT # 放自己的秘密如API和代理网址 os.path.exists('config_private.py')
+except: from config import proxies, WEB_PORT
 
 def find_free_port():
     import socket
diff --git a/predict.py b/predict.py
index a585310..9edb660 100644
--- a/predict.py
+++ b/predict.py
@@ -4,24 +4,12 @@ import logging
 import traceback
 import requests
 import importlib
-import os
 
-if os.path.exists('config_private.py'):
-    # 放自己的秘密如API和代理网址
-    from config_private import proxies, API_URL, API_KEY, TIMEOUT_SECONDS
-else:
-    from config import proxies, API_URL, API_KEY, TIMEOUT_SECONDS
+try: from config_private import proxies, API_URL, API_KEY, TIMEOUT_SECONDS # 放自己的秘密如API和代理网址 os.path.exists('config_private.py')
+except: from config import proxies, API_URL, API_KEY, TIMEOUT_SECONDS
 
 timeout_bot_msg = 'Request timeout, network error. please check proxy settings in config.py.'
 
-def compose_system(system_prompt):
-    return {"role": "system", "content": system_prompt}
-
-
-def compose_user(user_input):
-    return {"role": "user", "content": user_input}
-
-
 def predict(inputs, top_p, temperature, chatbot=[], history=[], system_prompt='', retry=False, 
             stream = True, additional_fn=None):
 
@@ -46,7 +34,7 @@ def predict(inputs, top_p, temperature, chatbot=[], history=[], system_prompt=''
 
     print(f"chat_counter - {chat_counter}")
 
-    messages = [compose_system(system_prompt)]
+    messages = [{"role": "system", "content": system_prompt}]
     if chat_counter:
         for index in range(0, 2*chat_counter, 2):
             what_i_have_asked = {}