diff --git a/repository/region.go b/repository/region.go
deleted file mode 100644
index febecc5..0000000
--- a/repository/region.go
+++ /dev/null
@@ -1,24 +0,0 @@
-package repository
-
-import (
-	"electricity_bill_calc/cache"
-	"electricity_bill_calc/global"
-	"electricity_bill_calc/model"
-)
-
-type _RegionRepository struct{}
-
-var RegionRepo _RegionRepository
-
-func (_RegionRepository) FetchRegion(code string) (*model.Region, error) {
-	cachedRegion, _ := cache.RetreiveData[model.Region]("region", code)
-	if cachedRegion != nil {
-		return cachedRegion, nil
-	}
-	region := new(model.Region)
-	has, err := global.DBConn.ID(code).NoAutoCondition().Get(region)
-	if has {
-		cache.CacheData(region, "region", code)
-	}
-	return _postProcessSingle(region, has, err)
-}
diff --git a/service/region.go b/service/region.go
index 293a649..c29f1bb 100644
--- a/service/region.go
+++ b/service/region.go
@@ -1,9 +1,9 @@
 package service
 
 import (
+	"electricity_bill_calc/cache"
 	"electricity_bill_calc/global"
 	"electricity_bill_calc/model"
-	"electricity_bill_calc/repository"
 
 	"xorm.io/builder"
 )
@@ -21,15 +21,15 @@ func (_RegionService) FetchSubRegions(parent string) ([]model.Region, error) {
 	return regions, err
 }
 
-func (_RegionService) FetchAllParentRegions(code string) ([]model.Region, error) {
+func (r _RegionService) FetchAllParentRegions(code string) ([]model.Region, error) {
 	regions := make([]model.Region, 0)
-	region, err := repository.RegionRepo.FetchRegion(code)
+	region, err := r.fetchRegion(code)
 	if err != nil {
 		return regions, err
 	}
 	regions = append(regions, *region)
 	for region.Level > 1 {
-		region, err = repository.RegionRepo.FetchRegion(region.Parent)
+		region, err = r.fetchRegion(region.Parent)
 		if err != nil {
 			return make([]model.Region, 0), nil
 		}
@@ -37,3 +37,16 @@ func (_RegionService) FetchAllParentRegions(code string) ([]model.Region, error)
 	}
 	return regions, nil
 }
+
+func (_RegionService) fetchRegion(code string) (*model.Region, error) {
+	cachedRegion, _ := cache.RetreiveData[model.Region]("region", code)
+	if cachedRegion != nil {
+		return cachedRegion, nil
+	}
+	region := new(model.Region)
+	has, err := global.DBConn.ID(code).NoAutoCondition().Get(region)
+	if has {
+		cache.CacheData(region, "region", code)
+	}
+	return _postProcessSingle(region, has, err)
+}