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。