《汉书·志·天文志》
立春、春分，月在东面顺从青道；立秋、秋分，月在西面顺从白道；立冬、冬至，月在北面顺从黑道；立夏、夏至，月在南面顺从赤道。
立春、春分，月东从青道；立秋、秋分，西从白道；立冬、冬至，北从黑道；立夏、夏至，南从赤道。
During the beginning of spring and spring equinox, the moon is in the east and follows the blue orbit; during the beginning of autumn and autumn equinox, the moon is in the west and follows the white orbit; during the beginning of winter and winter solstice, the moon is in the north and follows the black orbit; summertime, the moon is in the south and follows the red orbit.