The dividing line between north and south is Qinling and Huaihe River, which runs from south to north.
The south belongs to subtropical monsoon climate and tropical monsoon climate, and is located in high-pressure subtropical zone, so the climate is hot and close to the ocean.
Promote the circulation of warm and humid air flow in the ocean and compete with the cold air flow in the north,
Convective rain forms. So it is hot and rainy in summer and cold and dry in winter.
The north is located in the north temperate zone, so the climate is relatively warm. It faces the sea to the east and belongs to temperate monsoon climate. The climate is warm in summer and cold in summer. The west is deep inland, with large daily temperature difference and little rain all the year round, belonging to temperate continental climate.
Because Qinling-Huaihe line is the dividing line between 1℃ isotherm and warm temperate zone, middle temperate zone, humid zone and semi-humid zone, there are some differences between north and south.
The main reasons for this difference are latitude, land and sea, topography and so on, so there are some differences between the north and the south. Evergreen broad-leaved forest is the main vegetation in the south, and temperate deciduous forest and cold coniferous forest are the main vegetation in the north.