Research on the right system of state-owned agricultural land 并列题名：Research on the right system of state-owned agricultural land Research on the WTO legal system of agricultural trade Research on the reforming management system of state-owned asset in China Research on the operation system of "three rights" of contracted land 并列题名：Research on the reforming management system of state-owned asset in China Research on the legal system of agricultural product quality safety 并列题名：Research on the WTO legal system of agricultural trade 并列题名：Research on the operation system of "three rights" of contracted land