It is recommended to go to a local tertiary hospital for treatment. Because the tertiary hospital: 1. The comprehensive level of clinical disciplines is in the leading position in China and can be referred by other tertiary hospitals. 2. At least one key major has entered the international advanced ranks and has certain influence. 3. There are academic centers that cooperate with the World Health Organization or foreign academic institutions. 4. In the same review cycle, undertake 2-3 scientific research projects at or above the ministerial level, and win at least 1 national scientific research achievement award at or above the second level. 5. Be able to train interns above the attending physician and have the ability to train doctors and postdocs.