The things ordered by mail are usually paidondelivery.
通常邮购商品都是货到付款的。
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According to data released in January 2017, 56 percent of bills are paid online, which means that just under half of payments still rely ondelivery services to be completed.
Delivery delayed: if seller can not finish deliveryon time, he should pay penalty to buyer as follow: to any delivery date, if delay one day, penalty should be paid by 2% of payment of goods.