Hello, do you want to know the real name of the public welfare number? "Counting Public Welfare" whose real name is Zhang Yi, a native of Peking University, is a UP expert who specializes in high school and junior high school mathematics. Yi Shu, a member of Peking University, specializes in UP master's degree in high school and junior high school mathematics. As can be seen from the certificates he awarded, Yi Shu's real name is Zhang Yi.