佛祖統紀 40.60

40.60

正月。詔諸州置玄元皇帝廟。令當州學生數內習道德經莊子列子文子。每年依明經舉送朝廷。置助教一人。九月御興慶門樓。親試明道德經莊子列子。時姚子彥等對策入第○。

In the first month, an edict ordered the prefectures to establish temples to the Xuanyuan Emperor, and directed that among the students of each prefecture, they should study the Daodejing, Zhuangzi, Liezi, and Wenzi. Each year, in accordance with the Mingjing examinations, they were to be recommended and sent to the imperial court. One assistant instructor was established. In the ninth month, the Emperor presided at the tower of the Xingqing Gate to personally test their comprehension of the Daodejing, Zhuangzi, and Liezi. At that time, Yao Ziyan and others passed the examination with their policy responses.