diff --git a/backend/app/routers/information.py b/backend/app/routers/information.py
index f6a8554..5aa7503 100644
--- a/backend/app/routers/information.py
+++ b/backend/app/routers/information.py
@@ -464,7 +464,7 @@ def create_information(
         ).count()
         # 编号 = 日期 + 5位自然数（如 DJ2026041100001）
         seq = count_today + 1
-        deal_no = f"DJ{today[2:]}{seq:04d}"
+        deal_no = f"{today[2:]}{seq:04d}"
     
     info = Information(
         user_id=current_user.f99_90_id,