Nearly parallel with the Tien shan in part of its course is the Nan shan, Kwănlun or Koulkun range of mountains, also called _Tien Chu_ or ‘Celestial Pillar’ by Chinese geographers. The Kwănlun starts from the Pushtikhur knot in lat. 36° N., and runs along easterly in nearly that parallel through the whole breadth of the table-land, dividing Tibet from the desert of Gobi in part of its course. About the middle of its extent, not far from long. 90° E., it divides into several ranges, which decline to the south-east through Koko-nor and Sz’chuen, under the names of the Bayan-kara, the Burkhan-buddha, the Shuga and the Tangla Mountains,--each more or less parallel in their general south-east course till they merge with the Yun ling (_i.e._, Cloudy Mountains), about lat. 33° N. Another group bends northerly, beyond the sources of the Yellow River, and under the names of Altyn-tag, Nan shan, Ín shan, and Ala shan, passes through Kansuh and Shensí to join the Nui Hing-an, not far from the great bend of the Yellow River. Some portion of the country between the extremities of these two ranges is less elevated, but no plains occur, though the parts north of Kansuh, where the Great Wall runs, are rugged and unfertile. The large tract between the basins of the Tarim River and that of the Yaru-tsangbu, including the Kwănlun range, is mostly occupied by the desert of Gobi, and is now one of the least known parts of the globe. The mineral treasures of the Kwănlun are probably great, judging from the many precious stones ascribed to it; this desolate region is the favorite arena for the monsters, fairies, genii, and other beings of Chinese legendary lore, and is the Olympus where the Buddhist and Taoist divinities hold their mystic sway, strange voices are heard, and marvels accomplished.[5] From near the head-waters of the Yellow River, the four ridges run south-easterly, and converge hard by the confines of Burmah and Yunnan, within an area about one hundred miles in breadth. The Yun ling range constitutes the western frontier of Sz’chuen, and going south-east into Yunnan, thence turns eastward, under the names of Nan ling, Mei ling, Wu-í shan, and other local terms, passing through Kweichau, Hunan, and dividing Kwangtung and Fuhkien from Kiangsí and Chehkiang, bends north-east till it reaches the sea opposite Chusan. One or two spurs branch off north from this range through Hunan and Kiangsí, as far as the Yangtsz’, but they are all of moderate elevation, covered with forests, and susceptible of cultivation. The descent from the Siueh ling or Bayan-kara Mountains, and the western part of the Yun ling, to the Pacific, is very gradual. The Chinese give a list of fifty peaks lying in the provinces which are covered with snow for the whole or part of the year, and describe glaciers on several of them.