Either a cell phone hotspot with unlimited data, or Starlink if he’s going to be places without cell service.

Not sure about power, but you will have a PCIe lanes problem. The other x16 slot will only run PCIe 3.0 x4, when the GPU has an x16 connection. I don’t think you’ll get very good performance when the card only has 1/4 of it’s intended bandwidth.

There’s a reason why it’s called “The Great Firewall…” China is very good at controlling their internet and making sure their people can’t access the outside internet.