The Mongol invasion of China was aided now by an insurrection of Kitans. At the outbreak of hostilities Lyuko, a prince of the dispossessed Kitan dynasty, an officer serving in the Kin army, fled and levied men on his own account. He was ready to add his strength to Jinghis, when the latter sent Antchin Noyon to conclude an alliance against the common enemy. The two men ascended Mount Yen to finish the compact. On the summit they slew a white stallion and a black bull for their sacrifice. Turning then to the north they both held an arrow and broke it. Lyuko pledged his faith to Jinghis, and Antchin, in the name of his master, swore to uphold the Kitan prince against the Kin sovereign. There was need of prompt help, since an army sixty thousand in number was marching to annihilate Lyuko. Gold and high dignities were promised to him who should bring the rebel’s head to the Emperor. Jinghis sent three thousand warriors. With these, and his own troops, Lyuko defeated the Emperor’s army, and took all its baggage, which he sent to Jinghis, and received then a new reinforcement. Chepé Noyon was despatched to give aid in winning the land of the Kitans, and he gave it successfully. Master now among the Kitans, who rushed in great crowds to him, Lyuko, with the consent of Jinghis, proclaimed himself King of Liao. In 1213 Jinghis resumed his activity in China, and again there was slaughter on all sides. The Mongol armies swept on till they almost touched the gates of Chong tu, where bloody scenes were enacted. The year before, Hushaku, the Kin commander, had been stripped of his office and exiled. He was placed in command now in spite of protests from the governor, Tuktani, and others. Hushaku took command north of Chong tu, and, though the Mongols were near him, he passed his time mainly in hunting. Enraged because the Emperor cast blame on this conduct, he took a revenge which he had planned since his own reinstatement. He spread a report that Tuktani was rousing rebellion, and feigned that he, Hushaku, had been summoned to the city to repress it. Fearing military opposition he raised a false alarm to mask his real object. Horsemen rushed in hot haste to the city declaring that Mongols had come to the suburbs. Hushaku sent for Tuktani, the governor, as if to take counsel, and then with his own hand he slew him. Next he replaced the guard of the Emperor with his personal followers, and transferred to another edifice the Emperor, who was slain that same day by a eunuch. Hushaku wished supreme power for himself, but saw soon that his plans were impossible. The throne fell to Utubu, the late monarch’s brother.