1, because of work needs.

It has become a normal thing to stay up late and work overtime in big cities. From the beginning of the conflict, everyone has become accustomed to it now. They often change their plans and stay up all night writing stories. Less than a minute after the video ended, they even forgot to wash and fell asleep in bed. I have to get up early for work the next day, which is the status quo of urban office workers. There is no way to survive in a big city.

2. I want to do my own thing.

For office workers, only the little time after work every day belongs to them. Come home late from work, eat, eat and wash at about ten o'clock. Still want to play mobile phone for a while, do something you like, or get together with friends. It takes time, so there is no way. If I have no time during the day, I can only use the evening time. It's early morning after a little play, and my time is really too little.

I'm used to it.

A popular word now is health preservation. Everyone wants to have a healthy body and know how to go to bed early. But when you are used to staying up late, if you go to bed early one night, you will be very unaccustomed. So even if it's nothing, I may not go to bed early, and staying up late has become the norm.

Interpretation by reference:

Stay up late because of something.

"The Qingping Mountain Hall tells the story of Li Cuilian quickly": "The younger generation stays up late and has the spirit, and the old man stays up late and dozes off."

Back to the May 4th Movement of Cao Qingxueqin's Dream of Red Mansions: "Besides, those children stay up late, it's really cold."

Instructions for handling the first volume of the Mandarin Guide: This child is promising, can stay up late and can work.

The first act of Cao Yu's Peking Man: "You have lost weight, how can you stand staying up late?"

Lu Xun's social drama: he has a job during the day, so it is unreasonable to ask him to stay up late.