During his short reign as Emperor, Ch'in Shih Huang-ti (who died in 210 B.C.) is said to have travelled through the Empire to an extent that was only surpassed by the shadowy Emperor Yü who lived in the third millennium B.C. Yü was, according to tradition, the prince of engineers. He it was who "drained the Empire" and led the rivers into their proper and appropriate channels. The First Emperor might be said, had he not affected contempt for all who went before him, to have taken the great Yü as his model, for he too left a reputation of an ambitious if not altogether successful engineer. The story goes that he travelled all the way to the easternmost point of Shantung, and having arrived at the Promontory, decided to build a bridge from there to Korea, or to the mysterious islands of P'êng-lai where the herb of immortality grew, or to the equally marvellous region of Fu-sang. The case of the First Emperor affords a good example of how wild myths can be built up on a slender substratum of fact. Had he lived a few centuries earlier instead of in historic times, his name doubtless would have come down the ages as that of a demi-god; even as things are, the legends that sprang up about him in various parts of northern China might well be connected with the name of some prehistoric hero. The Chinese of eastern Shantung have less to say of him as a monarch than as a mighty magician. In order to have continuous daylight for building the Great Wall, he is said to have been inspired with the happy device of transfixing the sun with a needle, thus preventing it from moving. His idea of bridge-building had the simplicity of genius: it was simply to pick up the neighbouring mountains and throw them into the sea. He was not without valuable assistance from persons who possessed powers even more remarkable than his own. A certain spirit helped him by summoning a number of hills to contribute their building-stone. At the spirit's summons, so the story goes, thirteen hills obediently sent their stones rolling down eastwards towards the sea. On came the boulders, big and little, one after another, just as if they were so many live things walking. When they went too slowly or showed signs of laziness the spirit flogged them with a whip _until the blood came_.