I use Unicom's line here. In the past, I just couldn't get online with the all-in-one machine. As soon as I get to three, I'll immediately cut off the network. There is a way in the future: using dual routing is not really dual routing. There is a cat in front, you can buy it yourself, or send it by telecom, and then connect it to the router yourself. Available so far. We all do this. There are many little black internet cafes that use it this way.
Cats don't need to be set, just use the factory status, and use the bridge mode, which is only set on the router.