In ancient China, there were many taboos, such as taboos, which meant showing respect to someone and avoiding using words in other people's names when speaking. This is especially important in front of elders, and of course the emperor's taboo is even worse.
There are also feng shui taboos. Most people don't want to talk about death, death and ghosts, so they need to avoid talking about it.
Of course, it is also taboo for men and women to get along casually.
So avoiding taboos is taboo.