When Tian Kaibin was my secretary, according to my understanding of him, Tian Kaibin was a down-to-earth and intelligent person, and I believe he will make certain achievements in his fields of interest.

—— Li Zhiwen (distinguished professor, Ministry of Education of China, Cursor Professor of Zhejiang University, distinguished professor, Tsinghua University Institute of Economics and Management)

With your understanding and knowledge of mathematics, as long as you can go on this road for a long time, the future is limitless.

—— Wang Yongjun (famous middle school math expert, senior math coach of China Olympic Mathematics)

Tian Kaibin is the most proud student I have been teaching for decades.

—— Zheng (special-grade teacher, proposer of junior and senior high school mathematics competition in Hebei Province)

Stick to your own path and believe that you will succeed.

—— Gao (outstanding teacher in Zhejiang Province, principal of Hangzhou Yucai Middle School)

Teacher Tian and I smiled at each other, and we could understand each other and know what the other side wanted to say without talking.

-Zhu (a famous teacher of Zhejiang University, one of the most popular teachers in the whole school)