In fact, this sentence is a skill of recognizing people given to us by the old man. People often say that appearance comes from the heart, which means that a person's appearance can tell whether the person is good or bad, so you can keep your eyes open when getting along with others. "Turtleback" refers to an elderly man, or a person with a hunchback. "Snake waist" refers to beautiful beauties, beauty is a disaster, and it also refers to these people.

The "turtle's back" in this sentence generally refers to men, and also refers to the old man carrying a back. In my impression, they always seem to be hunched over with their hands behind their backs. Old people often say that such people are very powerful. If you are new to the world, try not to deal with them. However, Bi Zhi believes that it may be a psychological problem, because their physical defects may cause low self-esteem, which leads to their extreme psychology. Such people are very difficult to get along with.

"Snake waist" refers to a woman with a beautiful appearance and a good figure. It is also often said that beauty is a curse, and it is the result that people have proved with countless examples. Su Shi's "Beautiful Lady" mentioned that "Since ancient times, beauties have had a bad life, so don't blame yourself for the spring breeze." Wu Chengen's "Journey to the West" wrote, "Since ancient times, beauties have had a bad life, and they are speechless to the spring breeze." Cao Xueqin in "A Dream of Red Mansions" He also lamented that "the stunning beauty left the Han Palace, but the fate of beauties is the same in ancient and modern times." There are countless examples and records in the books of literati. The fate of the peerless beauty with the waist of water snake is bumpy. The disputes between men are mainly due to the competition for beautiful women.

The last half of the sentence means that if a person's eyes are not straight, he is a person with evil intentions. An unreasonable villain, this kind of person is very insidious. Eyes are the windows to a person's soul. You can usually tell whether a person's soul is upright and pure by looking into your eyes. People who don't look at people with a straight eye are those who do things dishonestly or who often hide bad thoughts. You need to be extremely careful when dealing with such people, and it can also be very tiring.