电子商务系统。首先客户应该在网页中选购自己需要的商品并将商品放入购物车中,选购好商品后就可以到收银台，在收银台进行填写收货人信息、提交收货人信息、查看账单等操作。-E-commerce system.First, the customer should be in the web page you need to choose and buy commodities and goods to be included in the shopping cart, choose good after

根据个人信息查询个人的养老保险，可以计算自己预计退休后得到的养老保险金(Endowment insurance calculator)

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