diff --git a/selector.py b/selector.py
index 52fa701..edef7f9 100644
--- a/selector.py
+++ b/selector.py
@@ -6,6 +6,11 @@ class Selector:
         return codes
 
 
+class Score:
+    def score(self, codes: [str], df: pd.DataFrame) -> [(str, int)]:
+        return list(map(lambda code: (code, 0), codes))
+
+
 class PeriodSelector(Selector):
     def __init__(self, period: int = 5):
         self.__period = period
diff --git a/财报筛选/选股测试.ipynb b/财报筛选/选股测试.ipynb
index a0a5149..a1ae465 100644
--- a/财报筛选/选股测试.ipynb
+++ b/财报筛选/选股测试.ipynb
@@ -6,8 +6,8 @@
    "metadata": {
     "collapsed": true,
     "ExecuteTime": {
-     "end_time": "2025-01-15T09:42:10.585456Z",
-     "start_time": "2025-01-15T09:42:06.693869Z"
+     "end_time": "2025-01-16T07:57:04.498115Z",
+     "start_time": "2025-01-16T07:57:00.401734Z"
     }
    },
    "source": [
@@ -56,13 +56,13 @@
     "]]"
    ],
    "outputs": [],
-   "execution_count": 17
+   "execution_count": 1
   },
   {
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2025-01-15T09:45:06.335656Z",
-     "start_time": "2025-01-15T09:45:06.291888Z"
+     "end_time": "2025-01-16T07:57:04.552251Z",
+     "start_time": "2025-01-16T07:57:04.499999Z"
     }
    },
    "cell_type": "code",
@@ -86,7 +86,7 @@
      ]
     }
    ],
-   "execution_count": 24
+   "execution_count": 2
   }
  ],
  "metadata": {