《宋书·志·卷十三》
根据月亮位置来称呼建看来也要用节气作为依据，概念随着实际情况而显明，而不是所谓北斗的斗杓所指的，近来校验汉代的节令，有半个星次的偏差，观察北斗确定节令的效果又在哪裹呢?
月位称建，谅以气之所本，名随实著，非谓斗杓所指。近校汉时，已差半次，审斗节时，其效安在。
It seems that the establishment of the calendar based on the position of the moon should also be based on the solar terms, and the concept is evident with the actual situation, rather than what is called the orientation of the handle of the dipper. Recently, verifying the Han dynasty's solar terms, there is a deviation of half a lunar mansion, so what is the effect of observing the dipper to determine the solar terms?