Study on the exercise system of rescission right of contract Study on the mortgage system of management right to contracted rural land Research on the operation system of "three rights" of contracted land Study on legal system of real right in China 并列题名:Study on the mortgage system of management right to contracted rural land Study on the legal protection system of the equal right to development Study on the legal system of retirement Study on the liability for breach of labor contract study on the integration strategy of European Union higher education 并列题名:Research on the operation system of "three rights" of contracted land