《宋书·志·卷十一》
西汉政权建立后，北平侯张苍才最早制定丁关于音律和历法的规贝。
汉兴，北平侯张苍始定律历。
After the Han Dynasty was established, only Zhang Cang, the Marquis of Beiping, created the earliest regulations for musical notes and the calendar.