Yes, I am a student of Mr. Sun's class of 2008. I am in my thirties this year. Every class led by my teacher has participated in a math contest. There are too many second and third prizes. In the two classes taught by my teacher, more than 30 people won the second and third prizes. One of the first prizes was my classmate, who walked directly to Tsinghua without the college entrance examination. This classmate is now working in Vanke headquarters.