《晋书·志·第八章》
缩加以后，小余满日法四千五百五十九，则交会加时在后一天；平朔小余不足减盈积分，则交会加时在前一天。
加之满日法者，交会加时在后日；减之不足者，交会加时在前日。
After the subtraction, if the small remainder is 4,559 full, then the additional hour of the meeting will be on the next day; if the pingyue remainder is not enough to reduce the positive integral, then the additional hour of the meeting will be on the previous day.