《宋史·列传·卷二百二十》
从前汉代洛下闳修浑仪，测定《太初历》，说 ：五百年后必会重造浑仪。 到唐代时的李淳风，果然重修浑仪。
昔汉洛下闳修浑仪，测《太初历》云： 后五百年必当重制。 至唐李淳风，果合前契。
In the past, during the Han Dynasty, Luoxia Hong repaired the armillary sphere, and determined the "Tai Chu calendar," saying: "Five hundred years later, the armillary sphere will definitely be reconstructed." Sure enough, Li Chunfeng during the Tang Dynasty reconstructed the armillary sphere.