Regarding mathematics, I recommend Wenhai or Wendeng. Wenhai includes Li Yongle, Wang Shian and Doctor Zhao, and Wendeng includes Wendeng Chen and Huang Xiankai. I recommend Haitian to go into politics, including Ren Rufen and Xiao Xiurong. The teachers I mentioned above are basically teachers who are highly recognized by everyone, but the postgraduate entrance examination is ultimately on their own, and there are many who do not sign up for the school. I hope to adopt them!