According to Taoism, there are ten types of people who have heavy yin qi and are prone to ghosts.

The first type, people with kidney qi deficiency, qi deficiency and body are weak first, and ghosts come to the feet first.

The second type is to be a disgusting and empty person, the grass and trees become ghosts, and the heart is weak and misbehaly.

Third, people who stay up late for a long time, yin and yang are often reversed, and qi and blood will be out of balance.

Fourth, lustful and lustful people, with a knife, lewdness will lead to kidney qi loss.

Fifth, people who have been in panic for a long time, panic will hurt the kidneys, and kidney deficiency will be hell.

Sixth, people who are too greedy, greedy and harmful to people's lives, and lose their anger and have a weak heart.

Seventh, people who are overworked, those who are tired are deficient, and those who are deficient in qi are evil.

The eighth type, those who are excessively sad, are as sad as the heart dies, and the heart dies by itself.

The ninth type is to put people to death, and to give birth to yin and yang in the dead land.

The tenth type, people with difficult fortunes, people are weak, and if they are weak, they are weak.

When the yin qi on these ten types of people reaches a certain level, they become yin people, and the place where the ten kinds of yin people intersect the most becomes yin land.

As far as I know, in addition to the standard underworld such as cemeteries, mourning halls, morgues, and funeral parlors, the most common place for these ten types of people to gather is nightclubs.