The best microorganisms in China are Peking University Institute of Microbiology, followed by Wuhan University, especially the Institute of Virology of Wuhan University. Many good professors.
Personally, it is not recommended to study for graduate students in China. It's better to apply for a PhD directly. Domestic masters are not recognized by foreign countries, except for doctors, which are still the same as undergraduate courses. A master's degree is just more research experience, so it's easier to apply. However, if the undergraduate pays close attention to it, especially after junior year, you can still have a good research experience.
There used to be a Japanese postdoctoral fellow in the lab. According to his understanding, Waseda University in Japan is generally strong in biology.
But doctors are mainly tutors, and it doesn't matter which school. If you have been in this field for a long time, you can know which school the talents in this field are in from the papers you send. Just choose a direction you like to apply for.