The Graduate School of Chinese Academy of Sciences includes the School of Mathematics and System Science, which means that the School of Mathematics and System Science is a secondary school under Chinese Academy of Sciences, such as the School of Computing and Communication, and it is the same level as the School of Mathematics and System Science, and both belong to the Graduate School of Chinese Academy of Sciences. The research institute and the graduate school are independent. When enrolling students, each research institute enrolls students independently, and all schools affiliated to the graduate school are enrolled by the graduate school in a unified way. If you apply for the Chinese Academy of Sciences, you can adjust it in the whole Chinese Academy of Sciences system, without the restrictions of graduate schools and research institutes. The graduate school is next to the Yuquan Road subway, and most of the graduate schools are in that compound. You have the right to make a certain decision on the institutions under the exemption, but the graduate school should also review your qualifications, so it is best to say hello to the specific institutions you want to apply for first. Each college has its own educational teachers, depending on what procedures are needed, and the graduate school can be responsible for the coordination between colleges. Humble opinion, laugh.