I flew for BCA. It was one of the better jobs in China but they don't have corporate jets. BCA used to be called Deer Jet. Deer Jet is now another subsidiary of the Hainan Group, along with BCA.

I don't know much about the other corporate jobs in China but they might be just recruiters offering jobs that don't exist yet, for aircraft that haven't been delivered. Deer Jet exists, and has for more than a decade. They have aircraft, and fly them.