《史记·八书·封禅书》
天子既然听了公孙卿以及方士的话，说黄帝以前的帝王封禅，都招徕异类以与神相通。所以想仿照黄帝以前的帝王招徕蓬莱士人以迎神仙，对世人抬高自己的身价以与九皇相比德，而又稍稍采用儒者的一套作为文饰。
天子既闻公孙卿及方士之言，黄帝以上封禅，皆致怪物与神通，欲放黄帝以上接神仙人蓬莱士，高世比德於九皇，而颇采儒术以文之。
Since the Son of Heaven had listened to Gongsun Qing and the warlocks, who said that the emperors before the Yellow Emperor who had performed the Feng and Shan ceremonies had all attracted spirits to communicate with the gods. Therefore, he wanted to imitate the emperors before the Yellow Emperor and attract Penglai scholars in order to welcome the gods, and to elevate his own status to be comparable to the Nine Emperors in the eyes of the world, while slightly adopting the Confucian theories as a decoration.