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1192
Li Zhi was born
Born in Liangcheng Hebei(Month and day of birth is unknown) -
1215
Moved to Yuan-shih district of Hopeh province
There was a war between the Jurchuns(People from his colon), and Genghis's khan's colony, because Genghis Khan tried to take over his colony. So he moved to Yuan-shih district of Hopeh province, for his studies. -
1230
Took the civil service exams
This occured in Lo-yang, and he passed it. -
1248
Li Yu finished his most famous piece of work(Ce yuan hai jing)
This piece of work is called Ce yuan hai jing (Sea mirror of circle measurements). Li Yu spent years of time and effort in his work. -
1251
Moved to to Hopeh province
After he published his incredible work, his financial position got better, which allowed Li Zhi to move back to Hopeh province, and buy a house near the Feng Lung mountain, inside the Yuan district. -
1257
Li Zhi meets Genghis Khan's grandson
Genghis khan knew that Li Zhi is good at science, and assumes that he knows how earthquakes occur. So he sends his grandson to meet Li Zhi to find out the reason for earthquakes to occur. -
1259
Li Zhi completed another important piece of work( Yi gu yan duan)
Li Zhi kept on working on his math work, and was able to make another piece of work. -
May 5, 1260
Kublai was elected Khan(Ruler) of his residence
Kublai Khan is Genghis Khan's grandson. -
1261
Kublai Khan gave a chance to Li Zhi to get a government positon
Li Zhi denied the opportunity due to his old age and bad health. -
1264
Li Zhi joined an Academy
Kublai Khan convinced Li Zhi to join his academy, and still teach people at a old age.(Li Zhi left the academy shortly) -
1279
The Death of Li Zhi
Li Zhi died due to his old age, but did not live peacefully due to people still coming to learn from Li Zhi even though he was very ill, and old. He died in China, Hopeh province.