I have never used any of these stores, so let's talk about my experience! The service in JD.COM is very good, and the express delivery is very fast. The disadvantage is that the freight for the first gadget is a bit high, and the second one is not necessarily JD. COM own operation, but also look at the following small print about after-sales. There are many fakes, but not all of them are fakes. It is very bad for Tmall to block all bad reviews on the basis of cost performance. It is difficult to return goods in Suning.cn. I bought a LeTV mobile phone in Suning, but it went wrong for two months, and no one took care of it after sale. Vipshop has never used it and it is not good to evaluate it!