The folk saying of hiding in tiankeng is a Feng Shui theory, which is a way of changing one's fortune by moving one's house.
The details are as follows:
The folk tiankeng means that the direction changes with the seasons, and there is an unknown direction. This direction changes clockwise with the changes of the seasons.
For example, it starts from the northeast corner and changes to the southeast corner by the end of spring.
The four seasons change, and the sinkholes change. With yourself as the center, when moving your house, define the sinkholes. The four seasons are in the northeast, southeast, southwest, and northwest!