diff --git a/src/nonebot_plugins/trimo_plugin_msctconverter/command_structure.py b/src/nonebot_plugins/trimo_plugin_msctconverter/command_structure.py
index 52ee034..130d23f 100644
--- a/src/nonebot_plugins/trimo_plugin_msctconverter/command_structure.py
+++ b/src/nonebot_plugins/trimo_plugin_msctconverter/command_structure.py
@@ -506,7 +506,7 @@ async def _(
         res, pnt = query_convert_points(
             usr_id,
             "structure",
-            random.random() % 0.4 + 0.1,
+            random.random() % 0.5 + 0.2,
         )
         if not res:
             buffer.write(ulang.get("convert.break.not_enough_point", NOW=pnt))