Pack the returned Merchandise along with the original sales invoice and contact detail.

请妥善包好退回的货品，附上订单正本及联络资料。

The exchange is only allowed if the Products are presented to the Company in its original packing and with the presentation of the original sales invoice.

本公司只接受任何能够出示购物单据正本及原货品包装之产品换货要求。

Beijing invoice is generally applicable to books is not perfect, but can control raw materials or into the sales tax.

北京开票一般适用于账册不够健全，但是能够控制原材料或进销货的纳税单位。

An invoice has clear and detail breakdown of overall cost that includes price of product, shipping charges and applicable sales tax.

账单内容能够清楚并详细显示费用之分类， 如产品之价格， 运费和相关税项。

The mother company issues the invoice directly to the end purchaser. The main income of the subsidiary comes from the commission on sales.

母公司直接开票给最终买家，子公司的利润来源主要为销售佣金。