Tmall is better. It is a well-established shopping website. It is safe and secure to shop with Alipay. I saw on TV that eBay seems to be the largest in China. But I have visited it and found it to be disorganized and inconvenient to operate. It is not as simple as Taobao. From the perspective of merchants, they are more likely to set up camp on Taobao because Taobao is very popular and Tmall's quality is guaranteed.