What is the millstone in Feng Shui?

Mills and stone mills used to be common items on farms.

Collecting grain in the field, grinding grain and peeling, and grinding wheat into flour are all inseparable from daily life. Folklore reveres it, deifies it, and grinds it into a dragon and a white tiger, although it is not necessarily white stone or bluestone.

During the Chinese New Year, paste "Qinglong Daji" and "White Tiger Daji".

This is similar to the so-called Tai Chi. So it formed a millstone on feng shui. This evil spirit is extremely dangerous and difficult to resolve. Only let nature take its course.