Sting is the third of the 24 solar terms. Battle nail, the sun reaches 345 degrees of the Yellow Meridian, and the festival is on March 5-6 of the Gregorian calendar. Spine reflects the state of germination and growth of natural organisms affected by rhythm changes. Speaking of earthquakes, the sun's spirit rises, the temperature warms up, the spring thunder suddenly moves, the rain increases, and everything is full of vitality.
Farming production is closely related to the rhythm of nature, and the solar term of fright is of great significance in farming, which is the reflection of ancient farming culture on natural festivals. The symbolic feature of the shocking solar terms is that spring thunder suddenly moves and everything is full of vitality. Judging from the natural phenological process in various parts of China, due to the large span between north and south, the time when spring thunder begins to ring is different in the morning and evening.
The twenty-four solar terms are:
"Twenty-four solar terms" is the product of ancient farming civilization. It is a knowledge system formed by ancient ancestors following the farming season and observing the movement of celestial bodies to understand the changing laws of seasons, climate and phenology in a year. The twenty-four solar terms were originally formulated according to the changes of stars. The Big Dipper rotates once and bucket handle rotates once clockwise, which is called one of the "years" (Figure).
The current "twenty-four solar terms" are formulated according to the position of the sun on the return to the ecliptic, that is, the annual movement track of the sun is divided into 24 equal parts, each 15 is 1, and each 1 is a solar term, starting in beginning of spring and ending in severe cold. Through historical development, the lunar calendar absorbed the solar terms of the dry calendar as a supplement to the calendar, and was adjusted to conform to the tropic year through the leap method, forming a combined calendar of yin and yang.