Study on the legal system of red line for the ecological protection Study on the legal system of ecological welfare Study on the legal system of new-type rural financial organization Study on the legal guarantee system of national ecological protection red line Study on the legal system of Chinese government investment Research on the legal system of cultivated land protection Study on the development of marine ecological civilization Study on the legal issues in sino-UE science and technology competition Study on legal system of Chinese regional trade integration Study on the index system of rational water resources allocation