Joker is the Joker, a supervillain under the American DC Comics and the archenemy of Batman. His real name and life experience are still a mystery. He first appeared in the first issue of "Batman".

In fact, there has never been a clear explanation of the origin of the Joker in the background of DC characters. The more commonly accepted theory is that the clown was originally an engineer in a chemical plant, but his ideal was to become a comedian.

Extended information:

Joker’s historical status is of course unquestionable. As we all know, Joker is Batman’s biggest villain. The two characters also complement each other. In TDK, Joker tells Batman Guo: You make me more complete. Joker can be said to be the other side of Batman.

Joker has transcended his original role and is not limited to one film. Joker's influence is huge and he has become a type of character. In the 663rd issue of "Batman", Morris said in the comic: The Joker is a chemical genius who invented laughing gas, but he is immune to it. For this reason, he abused this gas and killed many innocent people. . Among them, the ultimate poison gas he invented even defeated all other members of the regular alliance except Batman.

Reference: Baidu Encyclopedia-JOKER