Because of the delay, because the total bandwidth of domestic network operators and the United States is only 100G, just like China Netcom and China Telecom. Why are operators immoral? Because they can make the interface bigger and better, but in order to form an advantage in the competition, they sacrifice the interests of users and limit the bandwidth of the interface to each other, resulting in the delay and congestion of cross-network interoperability, not to mention going abroad for submarine optical cables. Your only solution is to bypass the damn operator and find an agent to solve it. It is suggested to use CPN to solve it.

It won't be much better in the city. Try it and try to find a place with high bandwidth!