Introduction to autumn.

1, autumn, yellow, Mid-Autumn Festival, frosty leaves, late autumn, autumn harvest, cold autumn, late autumn, early autumn, frosty days, golden wind, late autumn, late autumn, clear autumn, etc.

Autumn is one of the four seasons. In China, traditionally, "beginning of autumn" in the 24 solar terms is taken as the starting point of autumn. Entering autumn means that rainfall and humidity tend to decrease or decrease. In nature, everything begins to mature from luxuriance. According to the average temperature of modern scholar Zhang Baokun, there are four seasons in a year. The index is that the average temperature is lower than 10℃ in winter, higher than 22℃ in summer, and 10~22℃ in spring and autumn respectively.