回复：多谢各位, 可以在中国等AP吗? 家里有急事. 485 , AP 还未收到receipt.

If you want to use AP, you have to wait here to get it before you back to China.
If you have emergency situation, you can go to local office to submit your expedite processing request with your evidence. They can ask USCIS center to process your case within 2-3 days.