首先京东和苏宁易购都有自己的物流公司,也就是说由自己公司的物流配送,而亚马逊和当当网这类就属于电商平台,他们的快递物流合作是不固定的。
First of all, JD.com and Suning.com both have their own logistics companies, which means that they use their own logistics to deliver goods, while Amazon and Dangdang.com are e-commerce platforms, and their express logistics cooperation is not fixed.