The names of the astronomical institutions and the official titles of their main officials in various dynasties are as follows:
Qin Dynasty: Grand Historian
Western Han: Grand Historian, Grand Historian
Eastern Han: Grand Historian
Wei, Jin, Southern and Northern Dynasties: Bureau of Astronomers; Astronomer
Sui Dynasty: Bureau of Astronomers, Bureau of Astronomical Supervision; Grand Historian
Tang Dynasty: Bureau of Astronomers, Hall of Celestial Mechanics, Hall of Armillary Sphere, Bureau of Astronomical Supervision, Imperial Observatory; Director of Bureau of Astronomers, Hall of Celestial Mechanics, Bureau of Astronomical Supervision, Director of Imperial Observatory. 824 people
Song Dynasty: Bureau of Celestial Observations, Bureau of Astronomers, Bureau of Astronomy; Bureau of Celestial Observations, Director of Bureau of Astronomers
Liao Dynasty: Bureau of Celestial Observations; Grand Historian
Jin Dynasty: Hall of Celestial Observations; Supervisor, Bureau of Celestial Observations
Yuan Dynasty: Bureau of Celestial Observations, Huihui Bureau of Celestial Observations, Bureau of Astronomers; Supervisor, Bureau of Celestial Observations, Chief Officer of Bureau of Astronomers. 259 people
Ming Dynasty: Imperial Observatory; Grand Historian, Director. 41-23 people
Qing Dynasty: Imperial Observatory; Director. 154 people
Important astronomical and calendar calculation figures are as follows:
Before the Han Dynasty: Gan De, Shi Shen, etc.
Western Han: Deng Ping, Tang Du, Luoxia Hong (The Taichu Calendar)
Liu Xin (The Suntong Calendar)
Eastern Han: Liu Hong (The Qianxiang Calendar, the first complete calendar to record the fixed new moon)
Southern and Northern Dynasties: Zu Chongzhi
Three Kingdoms: Han Yi (the most accurate synodic month period in the Huangchu Calendar)
Tang Dynasty: Fu Renjun (compiled the "Wuyin Yuan Li", the first formal calendar to adopt fixed new moon)
Li Chunfeng, Yi Xing
Northern Song: Shen Kuo
Southern Song: Yang Zhongfu (the "Tongtian Calendar" adopted a tropical year length of 365.2425 days)
Yuan Dynasty: Guo Shoujing
Ming Dynasty: Xu Guangqi
Qing Dynasty: Mei Wending, Wang Xizhan