How are Chinese physicians trained and credentialed?

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Clarification of Question by paulbates-ga on 08 May 2004 08:25 PDT

I am referring to physicians in mainland china.  The answer should
explain whether physicians are "tiered" i.e. the US equivalent of
physicians assistants, primary care practitioners, specialist
practitioners; and how much training they require to achieve that
status, what (if any) ongoing training they require, and how are
licenses maintained.  By "licenses maintained", I mean whether ongoing
fees or training is required to remain a licensed physician.
Thank you!!