What is the completeness of 3,265,438+0 6,229,23 65,438+0 2,22?

March 2 1 is the vernal equinox, June 22 is the summer solstice, September 23 is the autumn equinox, and June 65438+February 22 is the winter solstice. Dichotomy is a solar term in the west. These solar terms are based on the trajectory of the direct point of the sun. Specifically, around March 2 1, the sun shines directly on the equator, which is the vernal equinox; Next, it will move north to the Tropic of Cancer and reach the summer solstice. The point pointing to the Tropic of Cancer will no longer move north, but turn south. Three months later, we will reach the equator, that is, the autumn equinox. Continue southward for three months to reach the Tropic of Capricorn, which is the winter solstice in the northern hemisphere; At the Tropic of Capricorn, it turned to the north and reached the equator three months later, that is, the vernal equinox of the following year. In this way, the four seasons change cyclically with the orderly passage of direct sunlight.