"The beginning of autumn" is not the same as "the beginning of autumn".

Introduction to the Beginning of Autumn:

The Beginning of Autumn is the thirteenth of the "Twenty-Four Solar Terms" and also the beginning of autumn. Dou points to the southwest, and the sun reaches 135° of ecliptic longitude, on August 7, 8 or 9 of the Gregorian calendar every year. "Li" means beginning; "Autumn" means the maturity of grain. Changes in the entire natural world are a gradual process. The Beginning of Autumn is the transition from Yang Qi to Yin Qi gradually shrinking and Yin Qi gradually growing.

The Beginning of Autumn is the third hottest solar term among the twenty-four solar terms, after the Great Heat and the Little Heat. In terms of the order of solar terms, the end of heat comes after the beginning of autumn, and the summer heat comes only in the second solar term of autumn, "end of heat" (late summer).

Introduction to Autumn:

Ruqiu means entering autumn. Two methods are often used to divide seasons: "solar terms method" and "temperature method". Traditionally, the "beginning of autumn" of the 24 solar terms is used as the beginning of autumn. Autumn, as divided by the "solar terms method", means that the Yang Qi is gradually closing and the Yin Qi is getting longer. All things begin to grow from luxuriant growth to maturity, and the harvest season has arrived.

Autumn is classified by the "temperature method" using the "climate average temperature" classification by modern scholar Zhang Baokun. According to the climatic average temperature method, the daily average temperature ranges between 10℃~22℃ for five consecutive days. It is considered to be autumn; autumn according to the temperature method means that the weather is cooler.

The main differences between the beginning of autumn and the beginning of autumn:

1. Different concepts

The beginning of autumn is a solar term, the thirteenth of the twenty-four solar terms Autumn is not a solar term, it refers to the passing of hot summer and the beginning of cool autumn.

2. The time is different

The Beginning of Autumn has a specific time, usually from August 6th to August 9th every year. The time of autumn is different in different places. It’s not fixed. The beginning of autumn in the north is about the same time as the beginning of autumn, but in the south the weather is still hot during the beginning of autumn, and the beginning of autumn will be later.

3. Temperatures are different

The beginning of autumn is at the end of the Dog Day period, and the temperature in many places is still a bit hot. However, in autumn, the weather will gradually cool down and the temperature will drop a lot, so It will take some time after the beginning of autumn for autumn to begin.