"I don't know what has become of this world?" Du Lengqiu was in the northern country at this time, on a mountain peak in the Central Plains. The four seasons here change distinctly, and it is most suitable for comprehending the reincarnation of the four seasons.

At this time, after he had finished practicing his sword song, he wanted to walk around and relax, so as to understand Lan Xing's dynamics at this time. He's a man of action, and he can go whenever he wants.

As soon as his body moved, he controlled the platinum demon slaying fairy light and flew out in a hurry, and he went to the nearest Central Plains first. He is clear about the long causeway in the east, and there is no need to look at it again, but the west is located on a plateau, and the safety is abnormal. At this time, it is just right to browse the great mountains and rivers, which can be described as killing two birds with one stone.

From the Central Plains to the west, the first thing you see is the Loess Plateau.

The Loess Plateau is located in the north-central part of the country and is one of the four major plateaus in China.

The Loess Plateau is more than 1,000 kilometers long from east to west, 750 kilometers wide from north to south, including the west of Taihang Mountain, east of Riyue Mountain in Qinghai Province, north of Qinling Mountains, and south of the Great Wall.

Before this cataclysm, after years of governance, the Loess Plateau has bid farewell to the tragic situation of serious soil erosion everywhere and bare soil slopes occupying almost all landforms, but its current situation of water shortage cannot be solved by treatment.

Du Lengqiu once watched some documentaries, and the water shortage in some areas is really serious, and it is completely a matter of watching the sky and eating. They built an earthen well in their home to collect some rainwater only when it rained.

The living situation is very worrying.

The reason for this is simple: it is an arid continental monsoon climate zone. Moist southeasterly winds are blocked by towering mountains and do not bring abundant rainfall.

In addition, in the past thousands of years, man-made overexploitation has led to the current situation of the Loess Plateau.

The tectonic units of this land mainly include the Longdong Plateau in northern Shaanxi, the Hualixi Fold Belt, the Pacific-style Yanshan Fold Belt, the Longxi Massif, the Zhongtiao Mountain Massif, the Luliangshan Massif and the Fenwei Downstream Subsidence Belt, etc., with the Qinling Ridge Axis and the Ordos Platform as the two major boundaries in the north and south.

In the past, the Loess Plateau was the granary of China and the lifeblood of dominating the world.

The dynasties of the Zhou, Qin, Han, and Tang dynasties that lasted for thousands of years were all based on the Loess Plateau and controlled the destiny of the entire East Asia. Because the soil here is very suitable for farming.

The loess of the Loess Plateau has fine particles, soft soil, rich in mineral nutrients, and is conducive to farming, and has a long history of basin and river valley farming. Except for a few stony mountains, the thickness of loess is between 50~80 meters, and the thickest is 150~180 meters.

With suitable soil, coupled with the cultivation of a large number of water conservancy projects, this place represents the advanced nature of East Asian and even world civilization.

In modern times, the Loess Plateau has given birth to the unique culture of the loess, and has produced the folk houses represented by the "cave cave" and the folk art represented by the Xintianyou and the Ansai waist drum.

In the age of the Internet, it has become synonymous with backwardness. Caves, Xintianyou, and waist drums have almost become intangible cultural heritage, and no young people are willing to learn these things.

Du Lengqiu had only heard those middle-aged uncles on TV, driving the sheep and singing in the barren mountains and mountains. He still remembers that image.

The undulating yellow slopes stretch like waves until the end of the sight.

He originally thought that the Loess Plateau was the flat loess, but the plateau was the plateau, and the hills were the norm.

The Loess Plateau is first and foremost a mountain range, and between the mountains, there are long hills.

The mountain range here

The topography of the Loess Plateau is high in the northwest and low in the southeast, and it descends in a wave-like manner from northwest to southeast. The Loess Plateau is divided into three parts: eastern, central and western, bounded by Liupan Mountain and Luliang Mountain: the western part of the Loess Plateau west of Liupan Mountain, with an altitude of 2000~3000 meters, is the highest area of the Loess Plateau.

The middle part of the Loess Plateau of Liupan Mountain and Luliang Mountain, with an altitude of 1000~2000 meters, is the main body of the Loess Plateau.

In the eastern part of the Loess Plateau east of Luliang Mountain, the terrain drops to 500~1000 meters, and the river valley plain occupies a large proportion.

According to this, the Loess Plateau can be divided into mountain area, loess hilly area, loess plateau area, loess plateau area, and river valley plain area.

Before the cataclysm, most of the Chinese people lived in the river valley plain, and a few residents lived in the central part of the country, at an altitude of 1000~2000 meters above sea level.

And a very small number of people will live in higher places such as Liupan Mountain and Luliang Mountain. For example, the very famous legend of the heroes of Luliang took place in Luliang Mountain.

The higher mountainous areas, such as the Lazhi Mountain and the Horsebit Mountain between the Nieshui and the Yellow River Valley in the west of the Loess Plateau, are extremely high in altitude, the highest point is as high as 4,000 meters, the terrain is high, the river valley is deeply cut, and the valley slope is steep, even the mountain people can not stand the environment here.

It's completely deserted,

In the middle of the Loess Plateau, Liupan Mountain, Baiyu Mountain, Na Mountain, Ziwuling, Huanglong Mountain, and Beishan on the north side of the Guanzhong Basin are mainly stony or soil and stone mountains.

The landform on the east and west sides of Liupan Mountain is quite different, and it is an important topographic boundary between the central and western parts of the Loess Plateau.

Meridian Ridge and Huanglong Mountain, the ridge is gentle, and it is subject to artificial logging and reclamation, and the vegetation is seriously damaged, and the water erosion and gravity erosion are serious. The North Mountain in the north of the Guanzhong Basin is composed of Loujing Mountain, Baojian Mountain, Beizi Mountain, Yao Mountain, etc., the mountain is sparse and low, steep in the south and gentle in the north, mainly composed of Cambrian and Ordovician limestones, and the karst landform is developed.

In short, the mountainous areas of the Loess Plateau are completely unsuitable for human habitation, but the hills between the mountains are the subject of human habitation. As a characteristic of the Loess Plateau, the caves were built here.

As a characteristic of northern Shaanxi, whether it is Xintianyou or waist drum, its birthplace is the hilly area of this high ground and wide area.

The hilly area is the most extensive landform area of the Loess Plateau, accounting for more than half of the area of the Loess Plateau. Due to the vast area of the hilly area, the differences are great, Linxia, Hezheng, Weiyuan and other places in Gansu are soil and stone hills, with an altitude of 1900~2300 meters, a relative height difference of 150~250 meters, and strong erosion of slope valleys.

Dingxi, Weiyuan, Tongwei, Huining and other places are distributed with a vast area of loess beam-shaped hills. The peripheral areas of Baiyu Mountain, Ziwuling and Nashan Mountain in Shaanxi, as well as the hills around Fuxian and Yijun are mostly longitudinal beam-shaped, with gentle slope of beam surface, steep beam slope and active erosion of slope valleys.

The ornamental hills distributed along the Yellow River such as Hequ, Baode, Xingxian and Linxian, as well as Suide, Mizhi, Jiaxian, Qingjian, Shenmu, Fugu and other places are the most typical hilly areas of the Loess Plateau, which are in the shape of scattered steamed buns, the red slopes are convex slopes, and the ground is abnormally broken, which is the most intense area of soil erosion on the Loess Plateau.

In the past, the life of the people in the Loess Plateau was not particularly satisfactory, and its degree of development was far less than that of the eastern coast, which made most of the young people here go out to settle down, and the population of the northwest continued to flow out, but after the cataclysm, it was a great change.

When Du Lengqiu flew to the Loess Plateau, he saw such a strange scene.