When the new dynasty finally proved victorious, Chiang Tzu-ya, by order of Yüan-shih T'ien-tsun, conferred on Wên Chung the supreme direction of the Ministry of Thunder, appointing him celestial prince and plenipotentiary defender of the laws governing the distribution of clouds and rain. His full title was Celestial and Highly-honoured Head of the Nine Orbits of the Heavens, Voice of the Thunder, and Regulator of the Universe. His birthday is celebrated on the twenty-fourth day of the sixth moon.
The Spirit of Thunder, for whom Lei Tsu is often mistaken, is represented as an ugly, black, bat-winged demon, with clawed feet, monkey's head, and eagle's beak, who holds in one hand a steel chisel, and in the other a spiritual hammer, with which he beats numerous drums strung about him, thus producing the terrific noise of thunder. According to Chinese reasoning it is the sound of these drums, and not the lightning, which causes death.
A. Gruenwedel, in his _Guide to the Lamaist Collection of Prince Uchtomsky,_ p. 161, states that the Chino-Japanese God of Thunder, Lei Kung, has the shape of the Indian divine bird Garuda. Are we to suppose, then, that the Chinese Lei Kung is of Indian origin? In modern pictures the God of Thunder is depicted with a cock's head and claws, carrying in one hand the hammer, in the other the chisel. We learn, however, from Wang Ch'ung's _Lun Hêng_ that in the first century B.C., when Buddhism was not yet introduced into China, the 'Thunderer' was represented as a strong man, not as a bird, with one hand dragging a cluster of drums, and with the other brandishing a hammer. Thus Lei Kung existed already in China when the latter received her first knowledge of India. Yet his modern image may well owe its wings to the Indian rain-god Vajrapani, who in one form appears with Garuda wings.
Lei Kung P'u-sa, the avatar of Lei Kung (whose existence as the Spirit of Thunder is denied by at least one Chinese writer), has made various appearances on the earth. One of these is described below.
A certain Yeh Ch'ien-chao of Hsin Chou, when a youth, used to climb the mountain Chien-ch'ang Shan for the purpose of cutting firewood and collecting medicinal herbs. One day when he had taken refuge under a tree during a rain-storm there was a loud clap of thunder, and he saw a winged being, with a blue face, large mouth, and bird's claws, caught in a cleft of the tree. This being addressed Yeh, saying: "I am Lei Kung. In splitting this tree I got caught in it; if you will free me I will reward you handsomely." The woodcutter opened the cleft wider by driving in some stones as wedges, and liberated the prisoner. "Return to this spot to-morrow," said the latter, "and I will reward you." The next day the woodcutter kept the appointment, and received from Lei Kung a book. "If you consult this work," he explained, "you will be able at will to bring thunder or rain, cure sickness, or assuage sorrow. We are five brothers, of whom I am the youngest. When you want to bring rain call one or other of my brothers; but call me only in case of pressing necessity, because I have a bad character; but I will come if it is really necessary." Having said these words, he disappeared.