《汉书·志·律历志上》
到元始年间王莽把持朝政，想沽名钓誉，就征召了天下通晓钟律的一百多人，叫羲和刘歆等人主持领导分条上奏，所说的最为详细。
至元始中，王莽秉政，欲耀名誉，征天下通知钟律者百余人，使羲和刘歆等典领条奏，言之最详。
In the Yuan Dynasty, Wang Mang controlled the court and wanted to seek fame and honor, so he recruited more than a hundred people around the world who were knowledgeable about the bells and chimes, and asked Liu Xin and others to oversee everything and then submit a divided report, which was the most detailed.