You, sir, seem a bit nutty.
They've been in Las Vegas like 10x over the years and been to a bunch of other countries too, Spain, Germany, UK, Ireland, Morocco, Netherlands, NZ, Australia off the top of my head. They work with the local promotions and regulatory bodies.
Just as an example how do the Chinese control the German officials at the last Mix Fight Gala/Wu Lin Feng card in Germany?
Curiously enough they've had a bunch of international refs in China too over the years. Tony Weeks from merycah, Stefano Valenti of Glory fame and fucking Joop Ubeda has been in China too.