(? ~ former 1978), with a surname, a wide literary name and a high word density, was later called Dayu, also known as Yudi, the leader and the first king of Xia Dynasty. From 2029 to 1978. He is the seventh grandson of the Yellow Emperor and the fifth grandson of Zhuan Xu. He is a wise emperor who is as famous as Yao and Shun in the legendary era of our country. His most outstanding achievement is to control the flood that has always been praised.