What do autumn dew, autumn cold and autumn frost mean?

1. The first autumn when autumn frost falls refers to beginning of autumn, that is, the beginning of autumn. The first frost is the last solar term in autumn, representing the end of autumn. The second autumn refers to the autumnal equinox, and these six solar terms are the whole process of the lunar autumn.

2. first frost in autumn comes from the 24 solar terms Song, which was formed in the 1990s. The almanac, textbooks and reference books before 1949 have different versions of solar term song. Twenty-four solar terms, which originated in the middle and lower reaches of the Yellow River, were first compiled into solar term song in the middle and lower reaches of the Yangtze River after thousands of years.

3. After the conversion to the solar calendar in the Republic of China, an upgraded version of solar term song was created by Zhang Xinyi in 1929 at the latest, and then spread to the whole country. 1947 formed a classic version of solar term song.

4. Due to the different natural conditions in different places, a timely local version of solar term song came into being, with at least 28 words and at most 420 words, forming a colorful family portrait of solar term song.