China's gender pay gap is widening, with no signs of pulling even, according to the Green Book of Population and Labor 2016, released by the Population and Labor Economics Institute of the Chinese Academy of Social Sciences on Nov. 30.

In 1990, women made on average 77.5 percent of men's salaries, but the rate dropped to 65.8 percent in 2010, as shown by a national survey on the status of women. The tendency of women to marry men with equal or higher levels of education also persisted from 2000-2005, reflecting the fact that the more education women have, the later they marry.

According to the report, per capita disposable income in China increased by 7.4 percent in 2015, higher than increases in previous years. However, the income distribution system still faces challenges, as represented by the low proportion of residents' income to GDP, and of labor remuneration to primary distribution. In addition, there are still large pay gaps between different industries.