Article 21 A business operator providing commodities or services shall issue a purchase or service voucher to consumers in accordance with relevant State regulations or commercial practices. A business operator must issue a purchase or service voucher where requested to do so by a consumer. 第二十一条经营者提供商品或者服务,应当按照国家有关规定或者商业惯例向消费者出具购货凭证或者服务单据;消费者索要购货凭证或者服务单据的,经营者必须出具。
Having purchase invoice or consignment voucher. 有进货发票或者发货凭证。
Purchase a RMB20 redemption voucher and obtain a boarding pass at the service counter. 上车前需购买20元抵用券并到服务柜台取得乘车证。