Which Helan Mountain does Yue Fei refer to in Red River?

Northwest mountainous area of Ningxia Hui Autonomous Region, China. It is 220 kilometers long from north to south and 20 kilometers wide from east to west. 40 kilometers. The southern part of the mountain is flat and flat, and the northern part north of Sanguan is relatively high, with an altitude of 2000? 3000 meters. The main peak, also known as Helan Mountain, is 3556 meters above sea level. The mountain area is asymmetrical from east to west, with gentle slopes on the west and faults in Yinchuan Plain on the east. Helan Mountain is a strong earthquake area, with an earthquake of magnitude 8 near Yinchuan 1739, and an earthquake of magnitude 7.5 in Zhongning 156 1 and Zhongwei 1709. The northern section of Helan Mountain is rich in coal reserves, and a new Helan Mountain coal industrial base has been built. Baotou-lanzhou railway has a branch line extending from Pingluo to Rujigou in Helan Mountain. Helan Mountain Range is located at the junction of Ningxia Hui Autonomous Region and Inner Mongolia Autonomous Region, starting from Bayan Aobao in the north and reaching Maotukeng Aobao and Qingtongxia in the south. The mountains are majestic, like galloping horses. The Mongols called the steed "Helan", hence the name Helan Mountain (this is wrong, Wei Chan wrote a poem in the Tang Dynasty: "Orchard under Helan Mountain was completed", and the Mongols did not rise until the13rd century, saying that it originated from Mongolian is just a common saying). Helan Mountain is 2,000 ~ 3,000 meters above sea level. The main peak, Aobao Ge Dong, is located in the northwest of Yinchuan, with an altitude of 3,556 meters, which is the highest peak in Ningxia. Helan Mountain Range is nearly north-south, stretching for more than 200 kilometers and about 30 kilometers wide, which is an important geographical dividing line in the northwest of China. The east side of the mountain is magnificent, with overlapping peaks and cliffs. East of the Yellow River Hetao and Ordos Plateau. Shanxi side is flat, not in Alashan Plateau. The vertical belt of vegetation in Helan Mountain changes obviously, including alpine shrub meadow and deciduous broad-leaved forest ... Overview of Helan Mountain Helan Mountain is also called Helan. Northwest mountainous area of Ningxia Hui Autonomous Region, China. It is 220 kilometers long from north to south and 2040 kilometers wide from east to west. The southern section of the mountain is gentle, and the northern section north of Sanguan is relatively high, with an altitude of 20,003,000 meters. The main peak, also known as Helan Mountain, is 3556 meters above sea level. The mountain area is asymmetrical from east to west, with gentle slopes on the west and faults in Yinchuan Plain on the east. Helan Mountain is a strong earthquake area, with an earthquake of magnitude 8 near Yinchuan 1739, and an earthquake of magnitude 7.5 in Zhongning 156 1 and Zhongwei 1709. The northern section of Helan Mountain is rich in coal reserves, and a new Helan Mountain coal industrial base has been built. Baotou-lanzhou railway has a branch line extending from Pingluo to Rujigou in Helan Mountain. Helan Mountain Range is located at the junction of Ningxia Hui Autonomous Region and Inner Mongolia Autonomous Region, starting from Bayan Aobao in the north and reaching Maotukeng Aobao and Qingtongxia in the south. The mountains are majestic, like galloping horses. The Mongols called the steed "Helan", hence the name Helan Mountain (this is wrong, Wei Chan wrote a poem in the Tang Dynasty: "Orchard under Helan Mountain was completed", and the Mongols did not rise until the13rd century, saying that it originated from Mongolian is just a common saying). Helan Mountain is 2000~3000 meters above sea level. Aobao Ge Dong, the main peak, is located in the northwest of Yinchuan, with an altitude of 3556 meters, which is the highest peak in Ningxia. Helan Mountain Range is nearly north-south, stretching for more than 200 kilometers and about 30 kilometers wide, which is an important geographical dividing line in the northwest of China. The east side of the mountain is magnificent, with overlapping peaks and cliffs. East of the Yellow River Hetao and Ordos Plateau. Shanxi side is flat, not in Alashan Plateau. The vertical zone of vegetation in Helan Mountain changes obviously, including alpine shrub meadow, deciduous broad-leaved forest, mixed coniferous and broad-leaved forest, Picea crassifolia forest, Pinus tabulaeformis forest and upland meadow. Among them, the pure forest belt of Picea crassifolia distributed on the shady slope of 2400~3 100 meters above sea level is the most important forest belt in Helan Mountain area, with large canopy density and good regeneration. There are 665 kinds of plants such as Picea crassifolia, Populus davidiana, Betula platyphylla, Pinus tabulaeformis and Almond in Mongolia. There are 180 kinds of animals, such as red deer, roe deer, argali, leopard, blue sheep, mink, blue pheasant and so on. 1988, the State Council declared Helan Mountain Nature Reserve as a national protected area, with an area of 6 1000 hectares. Helan Mountain is rich in natural resources. There are vast grasslands on the piedmont alluvial plain, which is an important producing area of Ningxia Tan sheep. Tan sheep with two hairs were called "golden autumn" in ancient times, and their fur was delicate and curly like a cloud. The mountainous area is rich in high-quality coal, and there are large mining areas such as Shizuishan 10. In addition, there are phosphorus limestone, seasonal sandstone, limestone, clay rock and many other minerals, among which the clay rock produced in Xiaogongkou is delicate, elegant and soft, and the Helan stone inkstone carved with it is one of the "five treasures" in Ningxia. Helan Mountain is the dividing line between temperate desert and temperate desert grassland, and also the watershed between northwest inflow area and outflow area. Towering terrain and good vegetation play an important role in protecting the ecological environment of the rich Yinchuan Plain. There are several east-west valleys in the mountains of Helan Mountain. The famous ones are Helankou, Suyukou, Sanguankou and Baisikou, which have been the main roads of east-west traffic since ancient times. There are many places of interest in Xixia in front of the mountain, including Xixia Cemetery, Rolling Bell Mouth, Baisikou Twin Towers and the unique Husha Wind Scenic Area. At the southern end of Helan Mountain is Qingtongxia, which is bronzed against the blue sky and the Yellow River. According to legend, when Dayu was controlling water, he split Helan Mountain and led the Yellow River to the north. Qingtongxia water control project has been completed. On the west side of Helan Mountain is Bayanhaote, an important town in Inner Mongolia, which means "the city of wealth" in Mongolian. At the eastern foot of Helan Mountain in Yinchuan, there are extremely rich rock paintings. Since a large number of rock paintings of Helan Mountain were discovered and published in 1980s, they have aroused strong repercussions at home and abroad. 199 1 In 2000, the biennial meeting of UNESCO International Rock Painting Committee for Asia was held in Yinchuan. 1996 The rock paintings of Helan Mountain were announced by the State Council as national key cultural relics protection units. 1997 The International Rock Painting Committee listed the rock paintings of Helan Mountain in the unofficial world heritage list. launch