got I485 approval notice last month, still waiting for Green Card, How long does it usually take to receive the green card?
-Case by case, normally about one month.
I plan to go back china soon, can I go now and enter US with AP?
-No unless you are outside US before the I-485 is approved. The AP is invalid now.
or do I have to wait for the green card?
-Yes, or go to USCIS local office to see whether you can get the GC stamp on your passport. If yes, you can use the GC stamp for the travel. Another choice is that you may ask someone recewive the GC for you send iy to you in China and you can use it to come back.
Thanks in advance.