Is that what you want to ask about the National Standard for Criminal Clothing Series (Trial)? It is a unified standard for prisoners' clothing, which is convenient for management and distinction. To put it simply, there are two points: first, when you are in prison, you can see at a glance that the staff are different from the prisoners; Second, once you escape from prison, no one will wear clothes for serving a sentence, and the signs are obvious before the prisoner changes clothes. It's the same as shaving your head in prison.