RUMOUR control...
Medical checks in China: it's not as overboard as you sometimes hear. Yes, they nearly always "find something," and you have to fix it. I have not heard of a liver biopsy but a friend of mine actually had to have his gall bladder removed, which sounds bizarre but is true. He's now a 787 captain in China, however, and quite happy even without the gall bladder.
Not that many actually "fail" the medical. Mostly, they just tell you they need this or that report/CT Scan/MRI/24-hr blood pressure report/cheat x-ray/other proof of your being ok. Then after you provide it, they issue your medical, and you're off and running.
It works like that.