Popular Cosmogeny.--An addition, however, to this simple system had to be made, in deference to, and on a plane with, the intelligence of the masses. According to this, the Male and Female Principles were each subdivided into Greater and Lesser, and then from the interaction of these four agencies a being, named P'an Ku, came into existence. He seems to have come into life endowed with perfect knowledge, and his function was to set the economy of the universe in order. He is often depicted as wielding a huge adze, and engaged in constructing the world. With his death the details of creation began. His breath became the wind; his voice, the thunder; his left eye, the sun; his right eye, the moon; his blood flowed in rivers; his hair grew into trees and plants; his flesh became the soil; his sweat descended as rain; while the parasites which infested his body were the origin of the human race. Recognition and Worship of Spirits.--Early Chinese writers tell us that Fu Hsi, B.C. 2953-2838, was the first Emperor to organize sacrifices to, and worship of, spirits. In this he was followed by the Yellow Emperor, B.C. 2698-2598, who built a temple for the worship of God, in which incense was used, and first sacrificed to the Mountains and Rivers. He is also said to have established the worship of the sun, moon, and five planets, and to have elaborated the ceremonial of ancestral worship. God the Father, Earth the Mother.--The Yellow Emperor was followed by the Emperor Shao Hao, B.C. 2598-2514, "who instituted the music of the Great Abyss in order to bring spirits and men into harmony." Then came the Emperor Chuan Hsu, B.C. 2514-2436, of whom it is said that he appointed an officer "to preside over the worship of God and Earth, in order to form a link between the spirits and man," and also "caused music to be played for the enjoyment of God." Music, by the way, is said to have been introduced into worship in imitation of thunder, and was therefore supposed to be pleasing to the Almighty. After him followed the Emperor Ti K'u, B.C. 2436-2366, who dabbled in astronomy, and "came to a knowledge of spiritual beings, which he respectfully worshipped." The Emperor Yao, B.C. 2357-2255, built a temple for the worship of God, and also caused dances to be performed for the enjoyment of God on occasions of special sacrifice and communication with the spiritual world. After him, we reach the Emperor Shun, B.C. 2255-2205, in whose favour Yao abdicated.