《晋书·志·第七章》
求次月朔月亮宿度：如果是小月，则在上月月度的基础上加二十二，月分加二百五十八。
求次月，小月加度二十二，分二百五十八。
Finding out the lunar lodge where the moon is located on the first day of the next month: if it is a small month, add twenty-two to the lunar month degree of the previous month, and add two hundred and fifty-eight to the lunar month fraction.