diff --git a/gomall/app/cart/biz/service/add_item.go b/gomall/app/cart/biz/service/add_item.go
index a00fbeac..64195b91 100644
--- a/gomall/app/cart/biz/service/add_item.go
+++ b/gomall/app/cart/biz/service/add_item.go
@@ -50,7 +50,6 @@ func (s *AddItemService) Run(req *cart.AddItemReq) (resp *cart.AddItemResp, err
 		ProductId: req.Item.ProductId,
 		Qty:       uint32(req.Item.Quantity),
 	})
-
 	if err != nil {
 		return nil, kerrors.NewBizStatusError(50000, err.Error())
 	}
diff --git a/gomall/app/frontend/biz/service/register.go b/gomall/app/frontend/biz/service/register.go
index 17c088ed..f37b71a1 100644
--- a/gomall/app/frontend/biz/service/register.go
+++ b/gomall/app/frontend/biz/service/register.go
@@ -47,7 +47,6 @@ func (h *RegisterService) Run(req *auth.RegisterReq) (resp *common.Empty, err er
 	session := sessions.Default(h.RequestContext)
 	session.Set("user_id", res.UserId)
 	err = session.Save()
-
 	if err != nil {
 		return nil, err
 	}
diff --git a/gomall/app/frontend/infra/mtl/metric.go b/gomall/app/frontend/infra/mtl/metric.go
index 57769285..f9618f87 100644
--- a/gomall/app/frontend/infra/mtl/metric.go
+++ b/gomall/app/frontend/infra/mtl/metric.go
@@ -53,7 +53,6 @@ func initMetric() route.CtxCallback {
 	}
 	registryInfo := &registry.Info{Addr: ip, ServiceName: "prometheus", Weight: 1}
 	err = r.Register(registryInfo)
-
 	if err != nil {
 		hlog.Error(err)
 	}
diff --git a/gomall/app/payment/biz/service/charge.go b/gomall/app/payment/biz/service/charge.go
index 9bd86785..55249ce5 100644
--- a/gomall/app/payment/biz/service/charge.go
+++ b/gomall/app/payment/biz/service/charge.go
@@ -44,7 +44,6 @@ func (s *ChargeService) Run(req *payment.ChargeReq) (resp *payment.ChargeResp, e
 	}
 
 	err = card.Validate(true)
-
 	if err != nil {
 		return nil, kerrors.NewBizStatusError(400, err.Error())
 	}
diff --git a/gomall/app/product/biz/model/product.go b/gomall/app/product/biz/model/product.go
index c1a23362..f8d1c352 100644
--- a/gomall/app/product/biz/model/product.go
+++ b/gomall/app/product/biz/model/product.go
@@ -76,7 +76,6 @@ func (c CachedProductQuery) GetById(productId int) (product Product, err error)
 		}
 		return nil
 	}()
-
 	if err != nil {
 		product, err = c.productQuery.GetById(productId)
 		if err != nil {