What is the relationship with Zhang?

And Zhang are a couple. Han Jingfeng, male, worked in the School of Social and Population Studies of Renmin University of China, and is now a professor in the Department of Sociology of the University of Pennsylvania. Mainly engaged in social inequality, class mobility, sociology of education and other aspects of research, won many academic awards. Zhang, female, once worked in China Academy of Social Sciences and School of Social and Population Studies of Renmin University of China, and is now a professor in the Department of Sociology of the University of Pennsylvania. Mainly engaged in crime and punishment, social control, social inequality and other aspects of research, won many academic awards. They started dating in China and got married while studying in the United States. Both of them teach at the University of Pennsylvania. They are famous "academic couples" in academic circles and often cooperate in research projects.