《淮南子·天文训》
斗柄指向酉辰，酉是黍成饱满的意思，音律用南吕，南吕的意思是阴气助万物成熟，大收之际。
指西，西者饱也，律受南吕；南吕者，任包大也。
When the Big Dipper points to yǒuchén, yǒu means that the millet is full, and the musical scale uses nánlǚ, which means that the yin qi helps all things mature, at the time of the big harvest.