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The 14^thamendment to the US Constitution says that anyone born in the US has automatic US citizenship and is entitled to all the citizenship benefits. This has given rise to the so-called “birth tourism” where pregnant women in the last two months of their  pregnancy came to the US to give birth and thus guarantee their offspring US  citizenship. However, apparently Chinese has taken this one step further. Couples  now can have their egg and sperm artificially fertilized and then hire a local US  women to carry the baby to term and gave birth; thus avoiding the labor of pregnancy  all together and still have a child that carries US citizenship. When the child grows  up, s/he can come to the US to attending high school and college with no immigration  difficulty. And when s/he reaches 21, her/his parents are eligible for green cards. The cost for the surrogate motherhood is  not cheap, about US$100K-145K (RMB 600K – 870K).But apparently many rich  Chinese are  able to afford this that the whole thing has become a business advertised  and promoted in China and  reported in mainstream US media http://www.today.com/video/today/53692612#53692612. This is truly “Money talks or 錢能使鬼推磨”

Note added 11/30/2013. One might ask "might some native US citizens object?". Two reasons: 1. The $100K-145K economic input to the US is one consideration. 2. Since the 14th amendment is part of the constitution, one has to move heaven and earth to get this feature changed. It is not a law that can be simply repealed.