AP, EAD and H1B

Dear friends,

I am now under the status of H1B (will expire next July, can renew it for another 3-year period). Meanwhile, my I140 has been approved, and I have submitted my I485, EAD and AP about 40 days ago.

I have a question for you all: I want to visit my parents in China using AP and EAD (most likely next May or June). If I renew my H1B next Feb, when I come back to USA (using AP and EAD), will my H1B still be valid? Or, if H1B is invalid, can I re-apply for it? Thanks a million!