Inverse: conflict; Not smooth; Violation of scales: Ancient emperors compared themselves to dragons, which had scales. Touching the inverted scales will make the dragon feel pain. Later it was called "anti-scaling" to refute the emperor's meaning and make faces.
Published: Everything is wrong: "Long Fu is a worm. If you are disturbed, you can ride it." However, there is a scale under his throat, and people kill people when they have it. The master also has a scale, and the speaker cannot have a scale without the master's scale. " .
Being hit in the heart is not a pleasant thing for anyone. Especially the defects of others, never attack with insulting language. In ancient China, there was a so-called "descaling". It is said that there is a "descaling" layer under the dragon's throat. If you accidentally touch this part, you will be killed by an angry dragon. In fact, no matter how noble and great a person is, there is a "lamella" on his body. The so-called "scaling" is what we call "pain", that is, shortcomings and inferiority. As long as you don't touch each other's "lamella", you won't get into trouble.