Category: the product types cover a wide range and are classified into many categories. The main content of the product is Taobao seckill products. The low price and activities of Taobao attract people's attention. However, the products are too rich and the recommendation is not targeted, which easily leads to the difficulty of user selection. Product settlement jumps to mobile Taobao application, which is easy to lead to user loss in operation (for example, no download of hand Taobao APP).