diff --git a/photo_review/auto_photo_review.py b/photo_review/auto_photo_review.py
index 78e764b..79839d8 100644
--- a/photo_review/auto_photo_review.py
+++ b/photo_review/auto_photo_review.py
@@ -587,6 +587,7 @@ def photo_review(pk_phhd, name):
             page_set = set(page_nums)
             cost_missing_page = required_set - page_set
         if cost_missing_page:
+            cost_missing_page = sorted(cost_missing_page)
             page_description.append(f"《住院费用清单》，缺第{','.join(cost_missing_page)}页")
 
     if page_description: