diff --git a/get_selected_courses.py b/get_selected_courses.py
index ce07a54..d3ae31b 100644
--- a/get_selected_courses.py
+++ b/get_selected_courses.py
@@ -2,77 +2,85 @@ from get_grade import get_grade
 
 
 def get_selected_courses(student_client):
-    # 获取成绩信息
-    grade = get_grade(student_client, output_type="grade")
+    try:
+        # 获取成绩信息
+        grade = get_grade(student_client, output_type="grade")
 
-    # 获取已选课程信息
-    selected_courses_data = student_client.get_selected_courses().get("data", {})
-    selected_courses = selected_courses_data.get("courses", [])
+        # 获取已选课程信息
+        selected_courses_data = student_client.get_selected_courses().get("data", {})
+        selected_courses = selected_courses_data.get("courses", [])
 
-    # 已选课程信息不为空时,处理未公布成绩的课程和异常课程
-    if selected_courses:
-        # 初始化空字典用于存储未公布成绩的课程,按学年学期分组
-        ungraded_courses_by_semester = {}
-        # 初始化空字典用于存储异常的课程,按学年学期分组
-        abnormal_courses_by_semester = {}
+        # 已选课程信息不为空时,处理未公布成绩的课程和异常课程
+        if selected_courses:
+            # 初始化空字典用于存储未公布成绩的课程,按学年学期分组
+            ungraded_courses_by_semester = {}
+            # 初始化空字典用于存储异常的课程,按学年学期分组
+            abnormal_courses_by_semester = {}
 
-        # 获取成绩列表中的class_id集合
-        grade_class_ids = {course["class_id"] for course in grade} if grade else ""
+            # 获取成绩列表中的class_id集合
+            grade_class_ids = {course["class_id"] for course in grade} if grade else ""
 
-        # 初始化输出内容
-        selected_courses_filtering = ""
+            # 初始化输出内容
+            selected_courses_filtering = ""
 
-        # 遍历selected_courses和grade中的每个课程
-        for course in selected_courses + (grade or []):
-            # 获取课程的class_id和学年学期
-            yearsemester_id = course["class_name"].split("(")[1].split(")")[0]
-            year, semester, seq = yearsemester_id.split("-")
+            # 遍历selected_courses和grade中的每个课程
+            for course in selected_courses + (grade or []):
+                # 获取课程的class_id和学年学期
+                yearsemester_id = course["class_name"].split("(")[1].split(")")[0]
+                year, semester, seq = yearsemester_id.split("-")
 
-            # 构建年学期名称,例如 "a至b学年第c学期"
-            yearsemester_name = f"{year}至{semester}学年第{seq}学期"
+                # 构建年学期名称,例如 "a至b学年第c学期"
+                yearsemester_name = f"{year}至{semester}学年第{seq}学期"
 
-            # 判断课程是否未公布成绩或为异常课程
-            if course["class_id"] not in grade_class_ids:
-                # 未公布成绩
-                ungraded_courses_by_semester.setdefault(yearsemester_name, []).append(
-                    f"{course['title'].replace('（', '(').replace('）', ')')} - {course['teacher']}"
-                )
-            elif course["class_id"] not in {
-                course["class_id"] for course in selected_courses
-            }:
-                # 异常课程
-                abnormal_courses_by_semester.setdefault(yearsemester_name, []).append(
-                    f"{course['title'].replace('（', '(').replace('）', ')')} - {course['teacher']}"
-                )
+                # 判断课程是否未公布成绩或为异常课程
+                if course["class_id"] not in grade_class_ids:
+                    # 未公布成绩
+                    ungraded_courses_by_semester.setdefault(
+                        yearsemester_name, []
+                    ).append(
+                        f"{course['title'].replace('（', '(').replace('）', ')')} - {course['teacher']}"
+                    )
+                elif course["class_id"] not in {
+                    course["class_id"] for course in selected_courses
+                }:
+                    # 异常课程
+                    abnormal_courses_by_semester.setdefault(
+                        yearsemester_name, []
+                    ).append(
+                        f"{course['title'].replace('（', '(').replace('）', ')')} - {course['teacher']}"
+                    )
 
-        # 构建输出内容
-        if ungraded_courses_by_semester:
-            # 存在未公布成绩的课程
-            selected_courses_filtering += "------\n未公布成绩的课程："
-            for i, (semester, courses) in enumerate(
-                ungraded_courses_by_semester.items()
-            ):
-                if i > 0:
-                    selected_courses_filtering += "\n------"
-                selected_courses_filtering += f"\n{semester}："
-                for course in courses:
-                    selected_courses_filtering += f"\n{course}"
-
-        if abnormal_courses_by_semester:
-            # 存在异常的课程
+            # 构建输出内容
             if ungraded_courses_by_semester:
-                # 如果存在课程,添加分隔线
-                selected_courses_filtering += "\n"
-            selected_courses_filtering += "------\n异常的课程："
-            for i, (semester, courses) in enumerate(
-                abnormal_courses_by_semester.items()
-            ):
-                if i > 0:
-                    selected_courses_filtering += "\n------"
-                selected_courses_filtering += f"\n{semester}："
-                for course in courses:
-                    selected_courses_filtering += f"\n{course}"
-    else:
-        selected_courses_filtering = "------\n已选课程信息为空"
+                # 存在未公布成绩的课程
+                selected_courses_filtering += "------\n未公布成绩的课程："
+                for i, (semester, courses) in enumerate(
+                    ungraded_courses_by_semester.items()
+                ):
+                    if i > 0:
+                        selected_courses_filtering += "\n------"
+                    selected_courses_filtering += f"\n{semester}："
+                    for course in courses:
+                        selected_courses_filtering += f"\n{course}"
+
+            if abnormal_courses_by_semester:
+                # 存在异常的课程
+                if ungraded_courses_by_semester:
+                    # 如果存在课程,添加分隔线
+                    selected_courses_filtering += "\n"
+                selected_courses_filtering += "------\n异常的课程："
+                for i, (semester, courses) in enumerate(
+                    abnormal_courses_by_semester.items()
+                ):
+                    if i > 0:
+                        selected_courses_filtering += "\n------"
+                    selected_courses_filtering += f"\n{semester}："
+                    for course in courses:
+                        selected_courses_filtering += f"\n{course}"
+        else:
+            selected_courses_filtering = "------\n已选课程信息为空"
+    except Exception as e:
+        print(e)
+        return "------\n无法获取未公布成绩的课程或异常的课程"
 
     return selected_courses_filtering
diff --git a/zfn_api.py b/zfn_api.py
index 8ff0bf8..0d29344 100644
--- a/zfn_api.py
+++ b/zfn_api.py
@@ -927,7 +927,7 @@ class Client:
         try:
             url = urljoin(
                 self.base_url,
-                "/xsxxxggl/xsxxwh_cxXsxkxx.html?gnmkdm=N100801",
+                "xsxxxggl/xsxxwh_cxXsxkxx.html?gnmkdm=N100801",
             )
             temp_term = term
             term = term**2 * 3