Who can tell me why the physical examination videos in Dr. Zhang are so rubbish that I can't open them? It has nothing to do with the internet speed computer, the speed has been measured. In addition, some videos can be opened. This is the problem of server-server interworking, which is the case with broadband in China. If the video you want to watch is on the telecom server, and you use Unicom broadband telecom, why should I show it to you without any income? This is an agreement between the website and the operator, and no one will care. Three networks in one has been called for several years, but operators have no effect for their own interests.