diff --git a/grade.txt b/grade.txt
index e3c1b64..e69de29 100644
--- a/grade.txt
+++ b/grade.txt
@@ -1 +0,0 @@
-d1a3278c2e67ee0e6b678bce78593cca
\ No newline at end of file
diff --git a/main.py b/main.py
index 344de01..df57432 100644
--- a/main.py
+++ b/main.py
@@ -129,7 +129,12 @@ for _ in range(run_count):
         grade_file.truncate()
 
     # 获取成绩信息
-    grade = student_client.get_grade("")["data"]["courses"]
+    grade_data = student_client.get_grade("2024").get("data", {})
+    grade = grade_data.get("courses", [])
+
+    if not grade:
+        print("成绩为空")
+        sys.exit()
 
     # 按照提交时间降序排序
     sorted_grade = sorted(grade, key=lambda x: x["submission_time"], reverse=True)
diff --git a/old_grade.txt b/old_grade.txt
index 246ff50..e69de29 100644
--- a/old_grade.txt
+++ b/old_grade.txt
@@ -1 +0,0 @@
-d1a3278c2e67ee