http://www.worldwidemedical.com/

This is an option, depending on how long you plan on staying. Keep your insurance at home too, though.

if you are working here, you most probably get medical coverage included in your compensation package. 

If you maintain your coverage abroad, be sure you double check about them paying claims while in China, many will not cover you while here.  Will also depend on the length of your stay here.  Make no sense in paying premiums and getting no coverage.

I get my Medical coverage from the VA medical center. All I have to do is be a resident of that state. My medical coverages are already paid for. They just require me to go check on the doctor once a year. Low costs for medicines and free shots year-round, x-rays. Just call me lucky I guess. I might try going back in the service to get that lifetime medical coverage.