回複：我在圖書館交了個美國女朋友,可以辦綠卡嗎? 黑人行嗎?

That is for sure. Yes, do it. As long as she can give you the card, no matter what the color is. Color does not matter.

I was told that a chinese boy who made an agreement with a black woman. Giving her $10k to marry her and then another $10k to divorce when he gets the card.

You have a true marrage for the true love. Why not go ahead and do it.