I Reform the Calendar at the Imperial Observatory

Shen Yan, a modern planetarium presenter, wakes up in the role of a lowly servant at the Imperial Astronomical Bureau in the fictional Great Yong dynasty. He saves his life by correctly predicting a solar eclipse. From then on, every accurate prediction of a celestial event earns him a promotion, while every revision to the old calendar strikes at the foundations of the powerful. Using astronomical calculations to establish his standing, he gradually uncovers the old calendar's errors and the tangled interests behind them. With verifiable observations and calculations, he rewrites the calendar, and his own fate along with it.