When did spring begin?

Tuesday, 4 February 1992. Beginning of spring, one of the 24 solar terms, is also called "Da Chun". "Li" means "start". China takes beginning of spring as beginning of spring, and on February 4th or 5th every year, when the sun reaches longitude 315th, it is beginning of spring. Twenty-four solar terms: "The solar terms in the first month will stand, and long summer will have the same long summer as autumn and winter.

Beginning of spring is a time point or period. China tradition divides beginning of spring's Tenth Five-Year Plan into three periods: "The east wind thaws, the insects start to vibrate, and the fish get cold", which means that the east wind warms and the earth begins to thaw. "beginning of spring solar terms, westerly jet, the southern branch of East Asia, has begun to weaken, and the winter climate is coming to an end. However, the intensity and location of the northern branch of westerly jet remain basically the same, the Mongolian cold high and Aleutian low are still relatively strong, and gale cooling is still the prevailing main weather.