Xu Heng is a man of moral cultivation. He doesn't take other people's pears without authorization, regardless of the sinister world. He is also an ambitious man, and the phrase "but I have a Lord in my heart" reflects his inner ideal; At the same time, he is a tireless learner.

Xu Heng served as the toast of imperial academy for a long time, presided over the education work, and spared no effort in publicity and education. Xu Heng's aim is to "educate people with fun and teach them face to face", so there are not only a large number of Han students but also many Mongolian disciples under his door.

The principle of his teaching is "to be good by feeling, to be open by understanding", that is, to be persuasive and implicit. In the eighth year of Zhiyuan (127 1), Xu Heng was ordered by Yuan Shizu to train a group of Mongolian nobles. Under his hard education, these young people who don't know Chinese have also become outstanding Confucian scholars who respect teachers and are conscientious.

Xu Heng's achievements.

Xu Heng is proficient in astronomy and calendar calculation. In the 13th year of Zhiyuan (1276), Yuan Shizu "mixed the sea and the universe, so the time must coincide", so he had to abandon the Jin Dynasty (Daming Calendar), which had been used for a long time and had many mistakes, and create a new calendar.

So, Xu Heng was ordered to "take charge of imperial academy affairs" and be fully responsible for this work, with Wang Xun and Guo Shoujing as deputies to jointly study and revise it. Through the active efforts of all the students, this arduous and complicated task was finally completed in the seventeenth year of Yuan Dynasty (1280). During this period, 70-year-old Xu Heng worked hard to plan and prepare for the taste.