What do you mean, four days away?

1, Li Si refers to the day before the vernal equinox, autumnal equinox, summer solstice and winter solstice, and the four unique days refer to the day before be

1, Li Si refers to the day before the vernal equinox, autumnal equinox, summer solstice and winter solstice, and the four unique days refer to the day before beginning of spring, Changchun, beginning of autumn and beginning of winter, which are called "unique days".

2. The working people in ancient China divided a year into 24 solar terms by studying the movement of nature and celestial bodies, mainly to remind us that some important days in our daily life should follow the time nodes of natural laws.