Peace now concluded with Jinghis, Utubu proclaimed complete amnesty to all, but not feeling safe, he left his heir in Chong tu, and set out for Pien king, the present Kai fong fu, better known as Nan king, on the southern bank of the Hoang Ho. On the way he attempted to deprive the Kara Kitans in his escort of the horses and arrows which had been given them. They revolted immediately, chose as leader one Choda and turned then toward Chong tu. Two leagues from the capital Choda met armed resistance, and though victorious, he sent envoys at once to Jinghis. These envoys tendered submission, and asked for aid straightway. The Mongol Khan did not hesitate; he sent a division of Mongols under Samuka, and a division of Jutchis under Mingan, with orders to join the Kara Kitans and capture the capital. Mukuli, the best Mongol leader in China, was sent at the same time to strengthen Lyuko, from whom a Kin army had retaken the greater part of his kingdom. When Utubu heard of this new Mongol inroad he summoned his son to Nan king immediately. Chong tu, the capital, was poorly provisioned, the Mongols were near it, their ferocity was famous; the besieged were in terror. Utubu hurried forward a great transport of food under Li ing, with a numerous army. The Mongols attacked this strong army. Li ing, who was drunk when they fell on him, was killed. The battle was lost, and the transport was seized and swept off by the victors. At news of this dreadful disaster the troops of two other Kin generals dispersed and the men went home to their families. Connection with the city was broken. The investment was merciless; want came, and next famine, with hunger so cruel that the dead were devoured, and then living men killed to be eaten. Fu sing, the governor, proposed to Chin chong, the commandant, to attack the Mongols with every force in the city, and die arms in hand or else conquer. Chin chong had not this view of duty. Fu sing, unwilling to witness the loss of the city in which he was governor, made ready to die with propriety. He gave all he had to his servitors, took poison, and ended his earthly existence. Chin chong hastened then to escape before the Mongols could enter. The Imperial princesses implored him to take them from the city, and save them, but, not wishing to hamper his flight, Chin chong asked some time to prepare for their journey. Once beyond the city, however, he fled and left those poor princesses to the Mongols. A great slaughter took place in the capital. The palace was fired, and burned, as is said, a whole month and even longer. Jinghis sent three officers to receive Imperial plunder, and give due praise to Mingan for his siege work.