Astronomy
Zu was an accomplished astronomer who calculated the values of time with unprecedented precision. His methods of interpolating and the usage of integration is far ahead of his time. Even the astronomer Yi Xing's isn't comparable to his value (who was beginning to utilize foreign knowledge). The Sung dynasty calendar was backwards to the "Northern barbarians" because they were implementing their daily lives with the Da Ming Li. It is said that his methods of calculation were so advanced, the scholars of the Sung dynasty and Indo influence astronomers of the Tang dynasty found it confusing.
Read more about this topic: Zu Chongzhi
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