Medicine is a practical science and a developing science. Medical students have to practice in hospitals to become doctors, and many doctors in hospitals are also professors in universities. Doctors save lives in hospitals, accumulate experience, conduct research, teach and train new doctors in universities.

Some affiliated hospitals of universities are affiliated hospitals of universities and some are teaching hospitals of universities, but they are generally high-level hospitals, often large hospitals. Hospitals and universities depend on each other and promote each other.