The overthrow of Lissechi prepared the way for the more formidable enterprise against Ninghia, where the Mongols had drawn their remaining power to a head. Ninghia, the old capital of Tangut, is situated in the north of Kansuh, on the western bank of the Hoangho, and the Great Wall passes through it. Strongly fortified and admirably placed, the Mongols, so long as they possessed this town with its gates through the Great Wall, might hope to recover what they had lost, and to make a fresh bid for power in Northern China. North and west of Ninghia stretched the desert, but while it continued in their possession the Mongols remained on the threshold of China and held open a door through which their kinsmen from the Amour and Central Asia might yet re-enter to revive the feats of Genghis and Bayan. Suta determined to gain this place as speedily as possible. Midway between Lintao and Ninghia is the fortified town of Kingyang, which was held by a strong Mongol garrison. Suta laid close siege to this town, the governor of which had only time to send off a pressing appeal for aid to Kuku Timour, the governor at Ninghia, before he was shut in on all sides by the Ming army. Kuku Timour apparently did his best to aid his compatriot, but his forces were not sufficient to oppose those of Suta in the open field, and Kingyang was at last reduced to such straits that the garrison is said to have been compelled to use the slain as food. At last the place made an unconditional surrender, and the commandant was executed, not on account of his stubborn defense, but because at the beginning of the siege he had said he would surrender and had not kept his word. After the fall of Kingyang the Chinese troops were granted a well-earned rest, and Suta visited Nankin to describe the campaign to Hongwou.