"Supply and demand. Demand for wives immensely outstrips supply. I would also guess that among the more affluent urban classes, the one child policy has lead to many young girls growing up with a high standard of living, which results in high expectations when they reach the age of marriage."Which is why Chinese men are going to Vietnam and Laos looking for brides. Most of the peasants will sell their daughter for a portable TV or a 6 month supply of Raman noodles.