  Equal pay is an essential component of gender equality, one of the
Sustainable Development Goals of the United Nations. Using resume data of over
ten million Chinese online job seekers in 2015, we study the current gender pay
gap in China. The results show that on average women only earned 71.57\% of
what men earned in China. The gender pay gap exists across all age groups and
educational levels. Contrary to the commonly held view that developments in
education, economy, and a more open culture would reduce the gender pay gap,
the fusion analysis of resume data and socio-economic data presents that they
have not helped reach the gender pay equality in China. China seems to be stuck
in a place where traditional methods cannot make further progress. Our analysis
further shows that 81.47\% of the variance in the gender pay gap can be
potentially attributed to discrimination. In particular, compared with the
unmarried, both the gender pay gap itself and proportion potentially attributed
to discrimination of the married are larger, indicating that married women
suffer greater inequality and more discrimination than unmarried ones. Taken
together, we suggest that more research attention should be paid to the effect
of discrimination in understanding gender pay gap based on the family
constraint theory. We also suggest the Chinese government to increase
investment in family-supportive policies and grants in addition to female
education.
