Have you ever heard of a place where people go if they are caught doing something wrong and need a time-out? It's called a prison. Just like when your parents put you in time-out when you misbehave, the courts put people in prison when they break the law.
In Beijing, which is a big city in China, there is a prison that is run by the government called the Beijing Municipal Prison. It's like a big building with lots of rooms where people who have committed crimes are sent to stay for a while.
There are different types of crimes that people can commit, and depending on what they did, they might stay in the prison for a short time or a very long time. While they are there, they have to follow all the rules and can't leave until they are allowed to go.
The people who work at the Beijing Municipal Prison are responsible for taking care of the prisoners and making sure they don't do anything bad while they are there. They give them food and water, and make sure they have a place to sleep. They also make sure that everyone inside stays safe and nobody gets hurt.
Just like when you go to school, there are different classes for different subjects, the Beijing Municipal Prison also has different sections for the prisoners based on the type of crime they committed. There are sections for people who stole things or hurt people and sections for people who did other things that are against the law.
While the prisoners are in the Beijing Municipal Prison, they might have friends and family who visit them. They can also get letters from people outside or talk to them on the phone, but they can't leave the building or have any visitors stay with them overnight.
So, the Beijing Municipal Prison is like a place where people go when they've done something wrong, and it's run by the government to keep everyone there safe and help the prisoners learn from their mistakes.