EntityQ712581· pop 16· linked from 213 articlesLi ChunfengSign in to saveancient Chinese mathematician, astronomer and historianConnectionsmusicEntitycalendar systemEntityLi BaiEntityPiConceptTaoismEntitycircleEntityastrologyEntityConfucianismEntityDu FuEntityTang dynastyEntityWayback MachineEntitypinyinEntityeclipseEntityChinese calendarEntityplaying cardEntitytoothbrushEntitysimplified Chinese charactersEntitySui dynastyEntityXuanzangEntitymetrologyEntityCategories602 births670 deaths7th-century Chinese astronomers7th-century Chinese historians7th-century Chinese mathematiciansHistorians from ShaanxiMathematicians from ShaanxiPoliticians from BaojiTang dynasty government officialsTang dynasty historiansTang dynasty science writersWriters from Baoji