Taobao, JD.COM, Suning and other shopping websites have too many pictures to load, and opening these websites is inherently slower than other websites.
3. There are too many devices for wireless routing, and the network occupation is unevenly distributed. There are users who download or watch movies, so you can't grab others when you open the webpage.
4. In this case, if you unplug the router and plug it in for a minute or two, the router will redistribute the ip and network speed, which will generally solve your problem.