if you leave BEFORE AP get approved, and didn't have H/L back, your I485 will be invalid.
if you have H or L, you can get H/L visa in Beijing (most likely this is what you want)
So very careful, leave USA only you have AP in your hand
if you have H or L, you can get H/L visa in Beijing (most likely this is what you want)
So very careful, leave USA only you have AP in your hand