"Burial Book" said: "The gasification of husband's yin and yang becomes wind, rises to cloud, fights for thunder, falls to rain, walks in the ground and is born with qi". Anger is a link in the cycle of yin and yang, which constantly moves and changes into wind, clouds, thunder, rain and anger. "The five elements of qi are underground and born in everything." Anger comes out of the ground, rises into the air, becomes wind, is blown away, and can't be used. Only the mountains around Jidi can keep out the wind, and only the slowly flowing water and lakes can gather vitality. The feng shui of tombs is similar to that of residential feng shui, which is why Jidi is usually a flat and terraced field surrounded by mountains and flowing water, where mainstream tributaries meet and people choose to build cities, villages, houses or ancestral graves.