Yeah that all makes sense. I spent a year working on a bizjet here in the US that was remote-controlled by a foreign nation because they wanted FAA endorsement on it. The FAA was in on absolutely everything, a rigorous cert process that cannot be done anywhere but US soil. The main thing that would concern me about a Chinese regional jet coming here is compliance with international standards for safety gear (TCAS, TAWS, transponders, radios, RVSM equipment etc.) but there have to be a ton of topics that get entirely missed. There must be a lot of trust involved when they allow that to happen.