Kong Yafeng. According to official website of Nanjing No.1 Middle School, Kong Yafeng is the most powerful math teacher in experimental junior high school of Nanjing No.1 Middle School. Graduated from Nanjing Normal University, senior middle school math teacher. Excellent coach of the National Senior High School Mathematics League, the ninth outstanding young teacher in Nanjing, an advanced individual in Nanjing, and an excellent party member in Nanjing's education system.