Do you know any incredible interesting things about Feng Shui in China?

A long time ago, there was a family in my hometown, and the situation was wrong. Animals at home are restless, the population is sick, and strange things always happen. I also asked if there was anything strange. The elder said he couldn't remember. Anyway, they won't invite the mage to see the house if they have nothing to do. This mage is not the kind of person in the Taoist temple, but a nearby villager who wears cassock all the year round. When the mage came to his house to ask for chopsticks, they used chopsticks, preferably red paint. Then he walked back and forth along the house with a chopstick in his hand, took a few steps and dropped another chopstick from his hand. As he walked slowly, he had his chopsticks picked up from behind. In this way, I walked several times and finally stopped on the path in the yard. Look at his feet. The fallen chopsticks didn't fall to the ground, but stuck in the soil with their tips pointing down, firmly. Let their family dig with shovels and picks along the place where chopsticks are tied. There was yellow soil all around, but after digging more than a foot, they saw a piece of black and red soil. There is something in the soil. The mage took it out and said it was okay. At that time, the master was rewarded with a table of wine and rice and 20 Jin of beef. I'm really listening to such a past story told by my elders, and I can't tell what the Feng Shui spells involved are.