diff --git a/.back/create_public_branch.py b/.back/create_public_branch.py
index 5c96d68..c66de81 100755
--- a/.back/create_public_branch.py
+++ b/.back/create_public_branch.py
@@ -44,10 +44,16 @@ def modify_speed_go(filepath):
     )
 
     content = re.sub(
-        r'\n\s*// 对于三网测速（cmcc、cu、ct），优先使用 privatespeedtest 进行私有测速[\s\S]*?\n\s*}\n',
+        r'''
+        \n\s*// 对于三网测速（cmcc、cu、ct），优先使用 privatespeedtest 进行私有测速
+        \s*\n
+        \s*opLower\s*:=\s*strings\.ToLower\(operator\)
+        [\s\S]*?
+        \n\s*}\s*
+        ''',
         '\n',
         content,
-        flags=re.MULTILINE
+        flags=re.MULTILINE | re.VERBOSE
     )
 
     write_file(filepath, content)