What is the most influential factor on the characteristics of rivers flowing out of China?

In most parts of China, the direction of Xia Feng changes obviously in winter. In winter, the airflow mainly comes from the high-latitude continent, prevailing northerly winds, and in summer, the airflow comes from the low-latitude ocean, with more southerly winds. Winter is controlled by winter wind, with dry and cold climate and strong wind. In summer, the vast areas in the east are mainly affected by the summer monsoon, and the climate is humid and rainy. Spring and autumn are controlled by winter and summer monsoon, and the weather is warm and cold, sunny and rainy. There are obvious dry and wet seasons and four distinct seasons in the vast areas of southeast China.

Southeast China is affected by monsoon, and the rainy season has obvious regularity. The rainy season is early in the south and late in the north, early in the east and late in the west; The rainy season ends early in the north, late in the south, early in the west and late in the east. Affected by monsoon, the precipitation in southeast China is mainly monsoon rainfall, and the regional distribution of precipitation is uneven. It is rainy in the east and dry in the west. There is more rain in the south than in the north.

Affected by the monsoon climate, the southeast of China is dry and cold in winter, hot and humid in summer, and the annual and daily changes of temperature are greater than those in the south, which shows that there is a big difference between north and south in temperature and humidity, and the difference between winter and summer is greater.

Due to the influence of monsoon, the annual average temperature in eastern China is on the high side. Compared with other parts of the world at the same latitude, the temperature is low in winter and high in summer (not as high as in winter).