I have been using Youpaiyun's CDN acceleration before. In addition to feeling that Youpaiyun's price is more expensive than Qiniuyun CDN, other CDN management and control functions are very good, and Youpaiyun is constantly adding new ones. Technologies, such as TLS 1.3, HTTPS 2, etc., have been added to CDN. It can be said that the domestic professional CDN is pretty good.