The autumnal equinox, the so-called "autumnal equinox", literally means separating autumn, that is, the autumnal equinox, that is, the middle point of autumn. Therefore, on this day, the whole world is as long as day and night. On this day, our sleep state can reach the best, so many people can love the autumnal equinox. Similarly, the autumnal equinox will bring us a cool climate.