diff --git a/main.py b/main.py
index bbf8ace..14fab93 100644
--- a/main.py
+++ b/main.py
@@ -135,7 +135,8 @@ def parse(content):
     return params_list
 
 
-base_url = 'https://libcon.bupt.edu.cn/http/77726476706e69737468656265737421f7b9569d2936695e790c88b8991b203a18454272'
+suffix = '77726476706e69737468656265737421f7b9569d2936695e790c88b8991b203a18454272'
+base_url = f'https://libcon.bupt.edu.cn/http/{suffix}'
 profession = "计算机软件与理论"
 keyword = f'(专业%3A"{profession}")'
 headers = {
@@ -318,7 +319,7 @@ def save(des, res, params):
 # 万方平台论文采集
 def run(max=10, last_page=100, page_size=20):
     if max > last_page * page_size:
-        writeInfo(f'采集数不能超过{last_page*page_size}')
+        writeInfo(f'采集数不能超过{last_page * page_size}')
         return
     db.modify(f'delete from {sys_paper}')
     db.modify(f'delete from {sys_word}')