A Chinese professor's controversial suggestion that poorer men could share wives has sparked debate online on how to solve China's gender imbalance. Zhejiang University economics professor Xie Zuoshi's proposal has been met with heavy criticism that it is immoral. China has one of the biggest gender imbalances in the world, with about 118 boys born to every 100 girls. The imbalance is largely due to the one-child policy and cultural preferences for male children. Read more