diff --git a/assets/image_20260713134152998.png b/assets/image_20260713134152998.png
new file mode 100644
index 0000000..98f3d9b
Binary files /dev/null and b/assets/image_20260713134152998.png differ
diff --git a/lib/report_generator.py b/lib/report_generator.py
index 9079797..dc1f97a 100644
--- a/lib/report_generator.py
+++ b/lib/report_generator.py
@@ -558,10 +558,10 @@ def generate_excel(orders, selected_fields, sum_fields, sum_results,
     os.makedirs(reports_dir, exist_ok=True)
     
     # 生成文件名 - 格式：配置名称_几月几日消费记录.xlsx
-    # 从 end_time 提取日期（格式：2026-07-13 08:00:00）
+    # 从 start_time 提取日期（报表数据对应的是开始时间那天的数据）
     try:
-        end_dt = datetime.strptime(end_time, '%Y-%m-%d %H:%M:%S')
-        date_str = f'{end_dt.month}月{end_dt.day}日'
+        start_dt = datetime.strptime(start_time, '%Y-%m-%d %H:%M:%S')
+        date_str = f'{start_dt.month}月{start_dt.day}日'
     except:
         date_str = datetime.now().strftime('%m月%d日')