Moving to China

Recently it was announced that chemical make Dupont is considering more acquistions of plants in China. It will also announce its second biggest research facility in China. Why would a prominent chemical company be moving its plants overseas to China? One reason could be that its biggest competition almost doubled Dupont's revenue in China last year. Could a bigger reason be that it is cheaper and more cost effective for Dupont to produce in China? Is it cheaper because China has more workers who will work for less money? Is it cheaper because China has lower standards on the environmental side?

http://money.cnn.com/2005/10/30/news/international/dupont_china.reut/index.htm