《宋史·本纪·卷十六》
元丰六年春正月初一，到大庆殿接受朝拜，开始用新乐。
六年春正月丁丑朔，御大庆殿受朝，始用新乐。
On the first day of the first lunar month in the spring of the sixth year of Yuanfeng, the emperor went to the Daqing Hall to accept the court and began to use the new music.