The map should be the revolution map of the sun, and the trademark of the revolution track has an arrow, that is, the direction of his revolution is from west to east. First, look at which is the summer solstice and the winter solstice, that is, look at the direct direction of the sun. The summer solstice is in the Tropic of Cancer and the winter solstice is in the Tropic of Cancer. Then judging the spring and autumn according to this, it is autumn after summer, and it is the autumnal equinox according to the direction of the revolution arrow.