According to Zhihu's inquiry, Zhou Yangxin was born in 1998. He is a doctor of engineering in Beijing Jiaotong University and a general teacher of advanced mathematics, linear algebra and probability statistics. National mathematics expert for postgraduate entrance examination, graduated from Beijing Jiaotong University at the age of 202 1 24, and attended the seminar on promoting postgraduate entrance examination held in henan university of economics and law. Zhou Yangxin is a math teacher. His teaching is enthusiastic and humorous, and he is good at helping students understand and solve problems quickly with popular language.