When the ten heavenly stems match the twelve earthly branches, two more earthly branches will be empty. This ten days will be when these two earthly branches are empty.

There are mainly several types of so-called emptying. The first is It is not empty after ten days, but the actual usage when breaking the corresponding period is that the moon is not empty. For example, if it is Si month and Yinmao is empty, then the moon of breaking Wu is empty.

The second is to clash with the sky. This is An action based on one of the two elements of false null is not null. . Empty means vacuum, false emptiness, vacuum means that there will be no time to be empty, false emptiness means that there will be time to become empty, prosperity is not empty, movement is not empty, in fact, the essence of prosperity is not empty and rushing into empty is the same. The movement is not empty, because the line with qi moves against the dark side (the theory is that the prosperous line moves against the dark side, but in actual use, it only needs qi), so this line will not be empty.

If Yin is empty, it will be empty on Shenri

The third is to fill it in. For example, if Yin is empty, it will no longer be empty on Yinri