There are 16 million straight women who are married to gay men in China. Zhang Beichuan, a scholar, estimates that more than 70% of gay men marry straight women. Using census data from 2011, Mr Zhang estimates that somewhere between 2-5% of Chinese men over the age of 15 are gay, or between 11m and 29m. The women who marry them are known as tongqi, which might be translated as “homo-wife”, using “homo-” for same. Xiao Yao, a 29-year-old magazine editor in Xi'an, Shaanxi province, divorced her gay husband in 2008: "Most gay men's wives I've known are silently suffering at the hands of husbands who could never love them, and like me, some even got abused by husbands who were also under great pressure," she said.
Source and more information: Asia One (here) and The Economist (here).