《史记·八书·天官书》
黄昏时以斗杓所指方位建明四时月份；斗杓，主华县西南方向的祸福吉凶。
用昏建者杓；杓，自华以西南。
At dusk, the position indicated by the Dipper's ladle is used to establish the months of the four seasons; the Dipper's ladle is in charge of the fortunes and misfortunes of the southwest of Hua County.