This is a meme from the "Batman" series.

Gotham City: Home to villains such as Batman and the Joker.

Arkham: A mental hospital located in the deep suburbs of Gotham City. Its full name is The Elizabeth Arkham Asylum for the Criminally Insane. Many famous villains in "Batman" were eventually sent here.

This sentence uses irony to euphemistically indicate that the crime rate in Gotham City is extremely high, and that Arkham Asylum houses extreme criminals with extremely high IQs.

Batman

He is the first superhero without superpowers in the history of DC comics. He only uses his mortal body and smart technology to deal with evil. This is Batman.

Story background:

Bruce Wayne was born into the Wayne family, one of the four major families in Gotham City. One night, his parents took the young Bruce home after watching the movie "Zorro". They were robbed by gangsters while passing by a trail. The gangsters brutally shot Bruce's parents to death in front of Bruce.

Since then, Bruce has had a strong desire to eradicate evil with his own hands. In order to prevent others from suffering the same tragedy as himself, Bruce has spent decades traveling around the world with his extraordinary talent. , visit the top or legendary fighting masters in the East and West, learn fighting techniques of various schools, and then return to your hometown to use your strong financial resources to manufacture various high-tech equipment, giving yourself the ability to punish evildoers.

From then on, during the day, he was a brainless rich second-generation playboy in the eyes of others; at night, he was the Dark Knight, Batman, who made criminals fearful.

Reference materials:

Baidu Encyclopedia—Arkham Asylum

Baidu Encyclopedia—Gotham City