回複：green card holder outside the country

Risky.

Theoritically, they should NOT issue you Green card as you've left the US. You should receive your green card through US embassy/consulate in China.

However, you still can use your green card to enter the US if the immigration officer does not check when you left and when the green cars was issued to you. It is risky. Nobody can be sure that you can be granteed to enter the US with your card.