1, Zu Chongzhi's little head was full of all kinds of whimsy since childhood, and he was very interested in the secrets between heaven and earth.

2. One day, my grandfather took Zu Chongzhi to visit He Chengtian, an official who is proficient in astronomy. He Chengtian liked the clever Zu Chongzhi very much, so he asked Zu Chongzhi: Learning astronomy is not only very hard, but also can't be promoted and made rich by it. Why do you study it? Zu Chongzhi said with a small chest: I don't want to get rich by litigation, I just want to find out the secret of heaven and earth.

3. After that, Zu Chongzhi often went to He Chengtian to study astronomy, calendar and mathematics, and also studied various mechanical devices. Through hard study and rich practice, Zu Chongzhi finally became an outstanding mathematician and astronomer.