diff --git a/internal/biz/cmb.go b/internal/biz/cmb.go
index acd2635..8cc21ba 100644
--- a/internal/biz/cmb.go
+++ b/internal/biz/cmb.go
@@ -125,9 +125,6 @@ func (v *VoucherBiz) CmbProductQuery(ctx context.Context, productNo string) (rep
 			EndTime:        *wechatResp.AvailableEndTime,
 			AvailableStock: "",
 			Detail:         *wechatResp.Description,
-
-			SaleStartTime: *wechatResp.StartTime,
-			SaleEndTime:   *wechatResp.StopTime,
 		}
 
 		reps.Amount = fmt.Sprintf("%d", *wechatResp.StockUseRule.FixedNormalCoupon.CouponAmount)
@@ -136,6 +133,13 @@ func (v *VoucherBiz) CmbProductQuery(ctx context.Context, productNo string) (rep
 		availableStock := *wechatResp.StockUseRule.MaxCoupons - *wechatResp.DistributedCoupons
 		reps.AvailableStock = fmt.Sprintf("%d", availableStock)
 
+		if wechatResp.StartTime != nil {
+			reps.SaleStartTime = *wechatResp.StartTime
+		}
+		if wechatResp.StopTime != nil {
+			reps.SaleEndTime = *wechatResp.StopTime
+		}
+
 		reps.AvailableType = vo.CmbAvailableTypeFixed.GetValue()
 
 		return nil