According to Baidu Encyclopedia, Hu, male, graduated from the School of Mathematical Sciences of Fudan University in 2008 and entered the middle school affiliated to Fudan University in the same year. He is a famous math teacher and education evaluation expert in Fudan High School in Shanghai. In 2023, a series of books "Mathematics Begins Here" was published.

Zhang Yongfu graduated from the Department of Mathematics of Tsinghua University in 2009, majoring in basic science of mathematics and physics. The math score of the college entrance examination 149, the champion of comprehensive science in Quanzhou City, Fujian Province, and the second prize of the national high school math league. Zhang Yongfu, who graduated from the Department of Mathematics of Tsinghua University, was appointed as the head of mathematics in Qingbei Online School on 20/0/8, a primary school mathematics thinking coach and an online high school mathematics teacher, and devoted himself to the research of mathematics teaching and quality improvement. Advocate clear and vivid teaching, "clarify" the requirements of the college entrance examination outline, analyze the various examination methods of each test center, and clarify the ideas of the proposer; "Bright" refers to learning mathematics without blindly pursuing boring repetition, trying to change the topic on the basis of appropriate variation, thinking from the perspective of the questioner, and achieving efficient learning.

To sum up, both teachers have strong personal abilities, so they both teach well.