diff --git a/internal/biz/cmb.go b/internal/biz/cmb.go
index 4ea9e6f..82b4375 100644
--- a/internal/biz/cmb.go
+++ b/internal/biz/cmb.go
@@ -120,7 +120,6 @@ func (v *VoucherBiz) CmbProductQuery(ctx context.Context, productNo string) (rep
 		reps.AvailableStock = fmt.Sprintf("%d", availableStock)
 
 		reps.AvailableType = vo.CmbAvailableTypeFixed.GetValue()
-		reps.AvailableDays = fmt.Sprintf("%d", *wechatResp.StockUseRule.FixedNormalCoupon.CouponAmount)
 
 		return nil
 	})