Carpenters know feng shui.

There is an ancient folk saying that it is best not to provoke three kinds of people in one's life. The first is a midwife, the second is a grave keeper, and the third is a carpenter. Then why is this?

Ancient carpenters were highly skilled, and their skills were mostly in the form of oral communication. There are few books about carpenters since ancient times. The contents of Lu Ban Jing handed down from the Ming Dynasty include some metaphysical contents in addition to industrial technology, so ancient carpenters may not be as simple as sawing wood. According to unofficial history's records, a family named Mo was awakened by a struggle every night after living in a new house, but the source could not be found. Even if hired, it's no use. Later, the property had to be sold. Later, when the buyer cleaned up, he found two people engraved on the beam, and their hair was twisted together. Asked the reason, he realized that the original owner had offended the carpenter, probably in revenge.

Another record said that the daughter of a rich family had a very chaotic life, often fooling around with the opposite sex in the house and had a very bad reputation in the workshop. Rich people also advised her to no avail, which was annoying, but there was nothing they could do. Later, when repairing the roof, I found that the rafters were engraved with patterns of misbehaving men and women, so I asked someone to take down the wood, and his daughter's problem was completely solved. This shows that in addition to superb skills, ancient carpenters seem to have requirements for mastering geomantic metaphysics.

Most ancient buildings are mainly made of wood structures, so the position of carpenters is extremely important, not only in design, but also in material selection. Although the status is not high, employers generally treat each other well because they are afraid of being abused. In case a narrow-minded craftsman does something, it's hard to say what will happen later. As can be seen from the previous examples, in ancient times, the vast majority of carpenters not only knew basic skills, but also knew Yin and Yang geomantic omen, magic and occult arts. Moreover, the ancients were very feudal and superstitious, and anything that was difficult to explain would be close to ghosts and gods.