Chifeng , also known as Ulanhad ( (Улаанхад хот) , "red cliff"), is a prefecture-level city in southeastern Inner Mongolia, People's Republic of China. It borders Xilin Gol League to the north and west, Tongliao to the northeast, Chaoyang (Liaoning) to the southeast, and Chengde (Hebei) to the south. The city has a total administrative area of and has a population of 4,341,245 inhabitants. As of the 2010 census, 1,094,970 of these residents reside within in the urban districts of Hongshan, Yuanbaoshan and Songshan. However, a large part of Songshan is still rural and Yuanbaoshan is a de facto separate town 27 kilometers away from the core district of Chifeng. The city was the administrative centre of the defunct Ju Ud League (; ).