1, kira Zhang Yi graduated from Shanghai Jiaotong University with a master's degree in mathematics. The teaching ideas are clear, humorous, and the knowledge points are explained in simple terms.

2. The main subjects are high numbers, line generation and probability. He is a teacher who set sail for the postgraduate entrance examination in Chengdu. The cumulative broadcast volume of postgraduate mathematics videos exceeds 1 10,000, which is deeply loved by the majority of candidates.