Research on social fairness guarantee in contemporary China 并列题名：Research on social fairness guarantee in contemporary China Research on social mentality in contemprary China Research on historical geography in contemporary China Research on Duhuang studies in contemporary China Research on the source of law in contemporary China 并列题名：Research on social mentality in contemprary China Research on the view of green development in contemporary China Research on ideology transition in contemporary China Research on problem of overwork in contemporary China