The map of China is as follows:

China’s terrain is high in the west and low in the east. It is complex and diverse. The proportion of various types of terrain in the country’s land area is: mountains 33.3%, plateaus 26%, basins 18.8%, Plains account for 12% and hills account for 9.9%.

The terrain tilts toward the ocean, which on the one hand helps the moist air from the ocean penetrate deep into the inland, causing precipitation; on the other hand, it causes many large rivers to flow eastward, connecting east-west transportation and facilitating economic connections between the coast and the inland.

Extended information

The division of Chinese provinces

1. Rough division

The division lines of Chinese provinces were initially roughly divided based on mountains, rivers and rivers Yes, the Tang Dynasty divided the world into ten areas based on mountains, rivers and rivers.

The dividing line between Hebei Road and Henan Road is the Yellow River. Because cars, boats and horses were inconvenient in ancient times, people in ancient times rarely traveled to distant places, and population mobility was particularly low. If population mobility is low, local culture will emerge.

In order to avoid this contradiction, we roughly divided it according to mountains, rivers and rivers.

2. Fine division

Shaanxi’s division is the epitome of fine division. Shaanxi is divided into three parts: Northern Shaanxi, Guanzhong and Hanzhong. Guanzhong is a land of four fortresses. It is easy to defend but difficult to attack, and it is also self-sufficient. It was once called the capital of the feudal dynasty.

But there is one shortcoming in Guanzhong, and that is the harassment from the northern nomads. In order to solve the threat in the Hetao area, northern Shaanxi was included in Shaanxi, so that there was a buffer zone, and the Hetao could be left in the west, and Shanxi and other places could also use this to support Guanzhong.

Baidu Encyclopedia--The People's Republic of China

Baidu Encyclopedia--Topography of China