《晋书·志·第七章》
把加时化为昏明定敷的形式，除以十二为度，余数为三则余少，余数为一则余强，余数为二则余少弱，所得为月去黄道度。
置加时若昏明定数，以十二除之为度，其余三而一为少，不尽一为强，二少弱也，所得为月去黄道度也。
Convert the Jia Shi into the form of He Ming Ding Fu, divide it by 12 to get the degree, if the remainder is 3 then it is slightly deficient, if the remainder is 1 then it is slightly excessive, if the remainder is 2 then it is slightly deficient and weak, and the result is the Moon's degree from the ecliptic.