What does Truman mean by a sentence he repeatedly said in The Truman Show?

In case I don't see you, good morning, good afternoon and good night. If I don't see you again, I wish you good morning! Good afternoon and good night! "

In the first half, Truman was still living in the virtual world, and then he really greeted his "friends". At the end of the movie, Truman found that everything around him was fake. When he walked out of the studio, he was greeting everyone (audience, "friends" and even the director), which means: you will never see me again.

Extended data:

The Truman Show is one of the classic masterpieces of black comedy. The film not only satirizes the indifference of morality, human feelings and the world, but also shows the skill of the creative staff in the production structure and plot setting of the whole film.

There are more than 5,000 cameras hidden in the town where Truman lives. Truman's father, mother, friend, wife, lover, friend, colleague, classmate and even irrelevant passers-by are all actors. Truman lived completely in a huge studio, so his world was a virtual space, but his life was exposed to audiences all over the world for 24 hours.

This little guy who was destined to be a big star was completely deprived of his freedom, privacy and dignity and became a victim of the mass entertainment industry without his knowing it.

Reference: Truman Show Baidu Encyclopedia