一、单证（Documents)
进出口业务涉及的单证总的包括三大类：
1、金融单证（信用证、汇票、支票和本票）
2、商业单证（发票、装箱单、运输单据、保险单等）
3、用于政府管制的单证（许可证、原产地证明、商检证等）
declaration form报关单
Three steps—declaration, examination of goods and release of goods, are taken by the Customs to exercise control over general import and export goods.海关对进出境货物的监管一般经过申报、查验和放行三个环节。
the person in charge of the declaration
invoice发票
ocean bill of lading提单
air waybill空运提单
packing list或packing specification（装箱单）
shipping order(装货单)
letter of credit（L|C）（信用证）
insurance policy（保险单）
sales confirmation售货确认书
contract（合同）（commodity, quantity, unit price, total amount, country of origin and manufacturer, packing, shipping mark, date of shipment, port of shipment, port of destination, insurance, payment, shipment, shipping advice, guarantee of quality, claims, force majeure, late delivery and penalty, arbitration）
certificate(commodity inspection certificate商检证
animal or plant quarantine certificate 动植物检疫证
certificate of origin原产地证
