What we are talking about here is that a person's appearance comes from the inside, or that a person's temperament is reflected in his physical form. This sentence happens to mean that men with turtle backs are not allowed to have sex. Turtle backs are also hunchbacks. Men with hunchbacks usually have lewd temperaments and do not act honestly. Snake waist means that a woman twists her waist when walking. Such women are usually frivolous and unstable, which can cause harm to men.

'You don't need a knife to look at people with a glance.' What is said here is that if a person's eyes are not straight and he often squints, his mind is not straight. This kind of person is very insidious. . Eyes are the windows to a person’s soul. You can usually tell whether a person’s heart is upright and pure by looking into his or her eyes. People who don’t look at people with a straight face are those who do things unfairly or who often hide bad thoughts. , such people should be very careful when interacting with each other, and they will be very tired.

In fact, this sentence is used to tell us some truths in life and warn us how to recognize a person clearly. . How to avoid making careless friends. Living in this world is not easy. “You must not have the intention of harming others, and you must have the intention of guarding against others. "When treating others kindly, we should also pay attention to protecting ourselves from unnecessary harm.

"A turtle's back and a snake's waist cannot make friends, and a glance at someone without a knife" is a common saying for our ancestors based on their daily life. Tips for getting to know people through experience. They pass these proverbs from generation to generation in the hope that they will not make the same mistake again. There is a saying in the countryside that "love comes from the heart", and a person's psychological quality can be directly reflected on his face. Therefore, we must be vigilant when getting along with everyone. After all, there is no bad person label on every bad person's face. We cannot say that people with hunched backs are bad people, and we cannot say that people with squinting eyes are bad.