How was Twenty-four solar term song written?

There are indications that the twenty-four solar terms originated in the middle and lower reaches of the Yellow River were first composed into ballads in the solar terms of the middle and lower reaches of the Yangtze River thousands of years later. After the conversion to the solar calendar in the Republic of China, the upgraded version of the solar term Song was created by Zhang Xinyi at the latest in 1929, and then spread throughout the country. Due to the different natural conditions in different places, a timely local version of solar term song came into being, with five sentences and seven sentences, the most refined four sentences and 28 words, the most classic eight sentences and 56 words, and the maximum number of words is 60 sentences and 420 words, which constitutes a colorful "family portrait" of solar term song.

Twenty-four solar terms are an important part of the long history and culture of the Chinese nation, which embodies the historical and cultural essence of Chinese civilization. "Twenty-four solar terms" and "December construction" are the basic contents of the calendar, which were concluded in ancient times (or ancient times). According to ancient records, Emperor Tiandi began to determine his age in the name of cadres and branches. "Twenty-four solar terms" is a special festival in the calendar, indicating the season, phenology, climate change and the establishment of "December construction". The repeated rotation of the Big Dipper is closely related to the change of seasons.

Taking the direction pointed by bucket handle, namely the Big Dipper, as the standard for judging seasons, it is called sword fighting, also known as Jian Yue. The method of the era of cadres and branches, the first month to build Yin, beginning of spring as the beginning of the year, the beginning of the month to pay the festival. One year is divided into twelve years ("completed in December"), in which "completed" represents the direction of the top of the bucket handle of the Big Dipper. In ancient times, the "twenty-four solar terms" were determined by the direction at the top of the bucket handle of Beidou, and bucket handle rotated to the "twelfth day" in turn, which was called "December Construction" (or "December Order").

In ancient culture, the time and position of branch and gossip are linked together. Yin position is the root position of the acquired gossip, the position at the end of the year and the beginning of the year, representing the end and beginning. For example, "Yi Shuo Gua Zhuan": "Gen, the divination in the northeast is also the beginning of all things." That is to say, bucket handle is one of the "years old", starting from the east to the north (Yin position, gossip position the day after tomorrow) and making a circle through the south, west and north. Therefore, silver moon is "spring is positive", and the beginning of spring is the beginning of a year. The twenty-four solar terms established by Beidou bucket handle began in the beginning of spring and ended in severe cold.