《三国志·蜀书·杜周杜许孟来尹李谯郤》
曾向刘熙学习，善于钻研中郑玄的经学，钻研《周易》、《尚书》、《三礼》、《毛诗》、《论语》等。
师事刘熙，善郑氏学，治易、尚书、三礼、毛诗、论语。
He once studied with Liu Xi, was good at studying the classics of Zheng Xuan, and studied the "Book of changes", the "Book of history", the "three rituals", the "Mao poems", the "Analects" and so on.