I took the exam by myself, and I am your senior. Hehe, your questions are all in place. I really need to know this when I choose to take the self-study exam. First, the key universities of 2 1 1 are not allowed to take self-study exams, but are only examiner colleges, so the aid institutions come to recruit students to run schools. These institutions are related to formality. I take classes at Nantah, except for accommodation. Second, the ultimate goal of taking the self-taught exam is to get the undergraduate certificate. The college certificate mentioned is the one admitted to the college, because only when you get the college certificate can you continue to get the undergraduate certificate. The diploma is from Tianjin University, and it won't say that someone completed the self-study exam in Nankai (or Tianda) and was allowed to graduate. Third, the passing rate also depends on your major. Choose a major that is easy to test, and the pass rate is still good. Fourth, there are many aid institutions in Tianjin, some of which are off-campus. You ask too many questions. You can add me and answer you in detail one by one. Hehe, I am a junior. I have been in school for two years and should be able to help you.