"Bu Da Bird" comes from Tang Jiafeng, a math teacher in the postgraduate entrance examination. It's a homonym for "Buda Bird". He is very popular among students. Many students often imitate Mr. Tang's speech because of his accent. For example, this question is as simple as a bird. No ridicule, no discrimination.

Mathematics Tang Jiafeng, male, Han nationality, has been certified as a "famous UP master" in education since the media. A new math tutor for postgraduate entrance examination, a math competition instructor for college students, and has many years of teaching experience in postgraduate entrance examination. Lectures: Advanced Mathematics, Linear Algebra, Probability Theory and Mathematical Statistics.