What does the man behind the night scene mean?

It means the figure of a man's back at night

The picture of a man's back is a very deep and mature idea of a man. There may be many stories in his heart that prevent him from opening up. He can only show it to others. There may be a lot of pain hidden behind him, and her face is gaunt. This is probably a man's bitterness, but also a man's commitment and responsibility.

The Back is a reminiscence essay written by modern writer Zhu Ziqing at 1925.