讀法同一二點一樣。跨越上下點嘅範圍時使用。因為上（中）下點得三個，跨越一二點嘅範圍，仲需要指定四個以上返點位置嘅時候，就唔用上中下點，而直接用甲乙丙點（天干一共十個，所以最多用到十個）。
The reading is the same as the two points. Used when crossing the range of upper and lower points. Because there are three lines of upper (middle) and lower points, spanning the range of one or two points, and it is necessary to specify more than four return point positions, you do not need to use the upper, middle and lower points, but directly use points A, B and C (there are a total of ten heavenly stems, so ten are used at most).