diff --git a/controller/park.go b/controller/park.go
index bc62d61..99db254 100644
--- a/controller/park.go
+++ b/controller/park.go
@@ -79,8 +79,8 @@ type _ParkInfoFormData struct {
 	Area             decimal.NullDecimal `json:"area" from:"area"`
 	Capacity         decimal.NullDecimal `json:"capacity" from:"capacity"`
 	TenementQuantity decimal.NullDecimal `json:"tenement" from:"tenement"`
-	Category         int                 `json:"category" form:"category"`
-	SubmeterType     int                 `json:"submeter" form:"submeter"`
+	Category         int8                `json:"category" form:"category"`
+	SubmeterType     int8                `json:"submeter" form:"submeter"`
 }
 
 func createNewPark(c *gin.Context) {
diff --git a/model/park.go b/model/park.go
index c681cc8..1700804 100644
--- a/model/park.go
+++ b/model/park.go
@@ -31,8 +31,8 @@ type Park struct {
 	Area               decimal.NullDecimal `json:"area"`
 	TenementQuantity   decimal.NullDecimal `json:"tenement"`
 	Capacity           decimal.NullDecimal `json:"capacity"`
-	Category           int8                `bun:"type:smallint,notnull,default:0" json:"category"`
-	SubmeterType       int8                `bun:"meter_04kv_type,type:smallint,notnull,default:0" json:"meter04kvType"`
+	Category           int8                `bun:"type:smallint,notnull" json:"category"`
+	SubmeterType       int8                `bun:"meter_04kv_type,type:smallint,notnull" json:"meter04kvType"`
 	Region             *string             `json:"region"`
 	Address            *string             `json:"address"`
 	Contact            *string             `json:"contact"`
diff --git a/service/park.go b/service/park.go
index b73ce2f..992fa86 100644
--- a/service/park.go
+++ b/service/park.go
@@ -34,7 +34,7 @@ func (_ParkService) SaveNewPark(park model.Park) error {
 func (_ParkService) UpdateParkInfo(park *model.Park) error {
 	ctx, cancel := global.TimeoutContext()
 	defer cancel()
-	res, err := global.DB.NewUpdate().Model(&park).
+	res, err := global.DB.NewUpdate().Model(park).
 		Where("id = ?", park.Id).
 		Where("user_id = ?", park.UserId).
 		Column("name", "abbr", "region", "address", "contact", "phone", "capacity", "tenement_quantity", "category", "meter_04kv_type").
@@ -126,7 +126,7 @@ func (_ParkService) FetchParkDetail(pid string) (*model.Park, error) {
 	ctx, cancel := global.TimeoutContext()
 	defer cancel()
 	var park = new(model.Park)
-	err := global.DB.NewSelect().Model(&park).
+	err := global.DB.NewSelect().Model(park).
 		Where("id = ?", pid).
 		Scan(ctx)
 	if err != nil {