First of all, we need to look at what to measure. To measure disasters, ghosts are used as gods. How can we say that using gods is good?
Those who test people usually use the six relatives as their gods. Of course, it is better to have a prosperous appearance, have energy, and not be restrained and vented. However, it cannot be too prosperous without venting. Extreme prosperity can also cause disaster.
Testing things depends on the application of gods. Generally speaking, things will come true if they are prosperous, but not if they are imprisoned. But there are also terms "sentimental" and "ruthless". For example, if one is looking for wealth, if it is prosperous, it means there is a lot of money. However, if the birth and birth coincide with the Yao, and it has nothing to do with the Yao, it means that the money belongs to others and I cannot get it.
There is also the original god. Trees have no roots and water has no source.