The film is based on the real events of the former Soviet Union's Salyut-7 space station rescue in 1985.
The movie is simple, and the plot progress is also very stable. Bringing out true masculinity.
A big suspense left is, what is the light without a light source, and does it have any symbolic meaning? Later, I checked and found that it was something called the "Angel Incident". There are also Zhihu saying that it is just an artistic technique and has symbolic meaning. But maybe both, because the historical "angel incident" is not recorded in the rescue operation, and the two appearances in the film are after the protagonist is rescued. All in all, it's an understated luxury movie.
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