Father's grave collapsed. What happened? Any signs?

It is not a good sign that a grave avoids falling into it for no reason. What's going on here? You have to find the reason yourself. When you find the reason, you can take corresponding countermeasures to eliminate misfortune. Sinking for some reason is generally not considered as a bad omen. As long as it is repaired in time, it will be safe and sound. I'm afraid I can't find out why it collapsed. At this time, it is time to ask Mr. Feng Shui to be accountable. Of course, who is in charge is in charge.