What does the ending of the paper plane mean?

The most regrettable thing is that Wang Yinong, who was in his twenties, died of renal failure due to drugs when he was young. The name of the paper plane was put forward by him. The boy said it was called the story of a paper plane. A paper plane can fly if it wants to, but it can only fly once in its life.

The female face is called Yang Liang. The girl said, let me choose again. I'm still taking drugs. I don't know what to do. Both her mother and friends advised her to quit, but she still found various reasons to take the money and run away.

Because of his poor family, he unfortunately took drugs in his childhood. This is the answer of each of them, but they didn't see their parents' anxiety and worry in the film.

Or they fly briefly like paper planes.

The film Paper Plane records the story of a group of young people in Beijing. They left their hometown for their ideals and freedom to face the turbulence and mutation of social values. They chose rock and roll, with a little doubt and loss, and continued to fight. Some of them are addicted to drugs, others are looking for abnormal love, and their lives become uncertain. This thought-provoking film features weird punk musicians.

The director's lens follows their daily life all the way ―― coming to the streets of Beijing, following them home and going to different official detention centers. This is a group of wandering young people with vague life values. They don't know why they live and fight. Drugs are the only eternal evidence in their lives.

The author recorded the life experiences of these young people with a calm and equal attitude, in which there was neither moral condemnation nor curiosity about a special marginal lifestyle. He just faced the existence of the object and quietly showed the audience that this was their choice and the price they paid for it.