The Chow dynasty of the Later Hans was the first to succumb to the princes of Wei, and the combined resources of the two states were then directed against the southern principality of Ou. The supreme authority in Wei had before this passed from the family of Tsowpi to his best general, Ssemachow, who had the satisfaction of beginning his reign with the overthrow of the Chow dynasty. If he had earned out the wishes of his own commander, Tengai, by attacking Ou at once, and in the flush of his triumph over Chow, he might have completed his work at a stroke, for as Tengai wrote, "An army which has the reputation of victory flies from one success to another." But Ssemachow preferred a slower and surer mode of action, with the result that the conquest of Ou was put off for twenty years. Ssemachow died in A.D. 265, and his son Ssemachu founded the new dynasty of the Later Tsins under the name of Vouti, or the warrior prince. The main object with Vouti was to add the Ou principality to his dominions, and the descendants of Sunkiuen thought it best to bend before the storm. They sent humble embassies to Loyang, expressing their loyalty and submission, but at the same time they made strenuous preparations to defend their independence. This double policy precipitated the collision it was intended to avert. Vouti paid more heed to the acts than the promises of his neighbor, and he ordered the invasion of his territory from two sides. He placed a large fleet of war junks on the Yangtsekiang to attack his opponent on the Tunting Lake. The campaign that ensued was decided before it began. The success of Vouti was morally certain from the beginning, and after his army had suffered several reverses Sunhow threw up the struggle and surrendered to his opponent. Thus was China again reunited for a short time under the dynasty of the Later Tsins. Having accomplished his main task, Vouti gave himself up to the pursuit of pleasure, and impaired the reputation he had gained among his somewhat severe fellow-countrymen by entertaining a theatrical company of five thousand female comedians, and by allowing himself to be driven in a car drawn by sheep through the palace grounds. Vouti lived about ten years after the unity of the empire was restored, and his son, Ssemachong, or Hweiti, became emperor on his death in A.D. 290. One of the great works of his reign was the bridging of the Hoangho at Mongtsin, at a point much lower down its course than is bridged at the present time.