A proper contract should include the rights and duties of each party, the price, quantity, specifications, models, time of delivery, port of loading and destination, forms of transportation and terms of payment.

• 一个正确的合同应包括当事各方的权利和义务、商品的价格、数量、规格、样式、交货时间、装货港、目的港、运输方式以及付款条件。