diff --git a/app/services/dict_cache_service.py b/app/services/dict_cache_service.py
index 6872a91..5f6dcaf 100644
--- a/app/services/dict_cache_service.py
+++ b/app/services/dict_cache_service.py
@@ -64,9 +64,10 @@ class DictCacheService:
                 for m in majors
             )
 
-            # 地区（省市级）
+            # 地区（仅市级：province_code 不为空且 city_code 为空；直辖市取市级避免与省级同名重复）
             result = await session.execute(text("""
-                SELECT code, name FROM bg_china_regions_code WHERE city_code IS NULL
+                SELECT code, name FROM bg_china_regions_code
+                WHERE city_code IS NULL AND province_code IS NOT NULL
             """))
             self._region_list = [dict(r) for r in result.mappings().all()]