Records of the Historian • The Five Emperors: "Yu, Gao Tao, Qi, Hou Ji, Boyi, Kui, Long, Li, Yi, Peng Zu have all been employed since Yao from time to time, without any division of duties."[2]
《Shangshu•Shundian》"The emperor said," Dragon, I'm slandered and wasteful, which shocked my teacher. I ordered you to make a promise and pay my order day and night, but only allow it. "[1]