(1) Used when placing an order: users can purchase goods in Pinduoduo APP, and they can choose vouchers to receive discounts on the settlement page;

(2) Order modification and use: If the user needs to modify the order after placing an order, he can select the voucher on the settlement page, which can reduce some expenses;

(3) Other uses: Some coupons can be used to participate in activities in Pinduoduo APP, and can also be used for shopping in Pinduoduo Mall to enjoy discounts.