The traditional shape of China.

The terrain of China is high in the west and low in the east, which is complex and diverse. The proportion of various landforms in China's land area is as follows: mountains 33.3%, plateaus 26%, basins 18.8%, plains 12% and hills 9.9%.

Terrain inclines to the ocean, on the one hand, it is beneficial for the moist air flow on the ocean to penetrate into the mainland and form precipitation; On the other hand, many large rivers flow eastward, connecting east-west traffic and promoting economic ties between coastal areas and inland areas.

Extended data

Division of China Province

1, roughly divided

At first, the dividing line of China Province was roughly divided by mountains and rivers. In the Tang Dynasty, the world was divided into ten roads according to mountains and rivers.

The dividing line between Hebei Road and Henan Road is the Yellow River. Because it was inconvenient to travel by boat and horse in ancient times, ancient people rarely traveled long distances, and the population mobility was particularly low. If the population mobility is low, then local culture will be produced.

In order to avoid this contradiction, it is roughly divided by mountains and rivers.

2. Fine division

The division of Shaanxi is the epitome of fine division. Shaanxi is divided into three parts: northern Shaanxi, Guanzhong and Hanzhong. Guanzhong is a place blocked on all sides, easy to defend but difficult to attack, and self-sufficient. It was once called the capital of the feudal dynasty.

However, Guanzhong has a shortcoming, that is, harassment from nomadic people in the north. In order to solve the threat of the Hetao area, the northern Shaanxi is included in Shaanxi, so there is a buffer zone, which can lead out of the Hetao from the west, and Shanxi and other places can also cooperate with Guanzhong through this.

Baidu Encyclopedia-People's Republic of China (PRC)

Baidu Encyclopedia-Chinese Terrain