To the south of the Yangtze River is the south, and to the north of the Yangtze River is the north?

No, it should be the Qinling-Huaihe line.

Qinling-Huaihe Line is the geographical dividing line that geographically distinguishes the northern and southern regions of China. There are obvious differences between the north and the south of this line in terms of natural conditions, geographical features, agricultural production and people's living customs.

From the name, the painting method of Qinhuai River line seems very simple. Draw a line along the Huaihe River in Qinling Mountains. But when you face a large-scale map of China, you will find that there is no way to start: the Qinling Mountains start from Baishishan in Gansu in the west, and the Huaihe River in Qinling Mountains is divided into north and south, only in eastern China. How to divide the western part of China into north and south is very interesting. The west can indeed be divided into two regions, but the north and the south are upside down, and the heat and cold are uneven.

To the west along the Qinling Mountains, there are roughly two east-west mountains connected with the Qinling Mountains: one is Qilian Mountain, which is connected with Altun Mountain all the way west; The other is the Kunlun Mountains, which starts from Pamirs in the west and stretches for more than 2,000 kilometers to the east. If the Qinling Mountains are divided into north and south to the west, we can consider these two mountain systems.

The distinction between north and south mentioned here is not a cultural concept, but refers to the distinction between north and south in natural geography, specifically the distinction between subtropical monsoon climate/region (south) and warm temperate monsoon climate/region (north). The subtropical and warm temperate zones of physical geography are defined and standardized.

The significance of Qinling-Huaihe line;

1, the north-south boundary of China.

2. It is equivalent to the annual precipitation of 750 mm in China.

3. The dividing line between paddy field and dry land, that is, the dividing line between main rice and wheat producing areas.

4. The dividing line between humid area and semi-humid area

5. It is equivalent to the isotherm of China 1 monthly average temperature of 0℃.

6. The dividing line between subtropical zone and warm temperate zone

7, the dividing line between the Yangtze River Basin and the Yellow River Basin

8. The dividing line between river ice-free period and ice-free period.

9, the middle and lower reaches of the Yangtze River Plain and the Loess Plateau, North China Plain boundary.

10, the dividing line between subtropical evergreen broad-leaved forest and temperate deciduous broad-leaved forest

Refer to the above? Baidu Encyclopedia-Qinling-Huaihe Line