But, using AP does not necessarily invalidate your H1/H4 status, as long as the H1 still works for the same employer. This is kind of "gray area" in the immigration law.
My suggestion is that you make your judgement depending on how many years still left for the H-1B and whether the H-1 has been working for the same employer for the past few years.
If the H-1 has not changed employer since the beginning of greencard application, then your chances of 485 being approved without any employment RFE are quite high. I would say go ahead and use your AP. Also, if the H-1 has only about one year left (out of 6 years), I do not see much value in renewing it in China either. If that is the case, again, go ahead with the AP.