Is it credible to say that there is something wrong with the ancestral grave?

Can feng shui master infer the good or bad luck of the family ancestral grave after reading the eight characters of a descendant? What does a tree in the southwest of the ancestral grave imply?

1, it is reasonable to say that the boy's horoscope can't tell the good or ill luck of the boy's ancestral grave. Seeing Feng Shui is a science, and the most important thing is orientation.

2, the southwest is the sand position, that is, Kun position. It's good to have a tree, even better for the hostess. Don't cut it.

3. The influence of Yin house geomantic omen accounts for more than 60%, while Yang house geomantic omen only accounts for about 40%. Echo each other.