Research on the negativity and Marcuse's thoughts A research on the negativity and Marcuse's thoughts Research on Zhang Qiyu's academic thoughts Research on Chinalized Marxism ethics thoughts Research on Cai Yuanpei's modern artistic thoughts Research on Mohist management thoughts Research on the legal issues of property rights Research on Liang Qichao's aesthetic thoughts Research on the legal protection of patients' rights Research on the core of value added tax deduction rights