My brother wants to take the postgraduate entrance examination in microbiology, and the school is still hesitating between Nankai University, Xiamen University and Jiangnan University, asking God for an analysis and suggestion. Hello, Nankai is the best of these three schools, followed by Xiamen University and Jiangnan. The creatures in Nankai are already fierce, and there is no problem in the top ten in the country. The biology of Xiamen University is not bad, but its specialty field is marine biology, and the microorganisms are slightly weak. Not much to say about Jiangnan University, which is also inferior to the first two 985 universities. Of course, the difficulty of the postgraduate entrance examination is definitely the harder the better. Challenges and opportunities coexist, depending on how you choose.