Approximately 30 million more men than women will reach adulthood and enter China's mating market by 2020.The Chinese call these young men "bare branches" as they are unlikely to bear fruit. The article concludes:
China needs creative large-scale solutions to the problems that unprecedented cohorts of bare branches will cause as they come of age over the next two decades.It occurs to COTTonLINE that one solution would be sending many unmarried young men overseas in search of brides, perhaps as graduate students, or more ominously as soldiers. U.S. soldiers brought home lots of overseas brides.
How about polyandry, where a woman takes more than one husband at the same time? There are places where it has happened, admittedly not many.