Seeking the name of a science fiction novel

It was a science fiction novel. The plot was about a person who realized that the photos he took with his camera had numbers on them. It seemed to be a countdown and was related to an alien invasion.
He could also recall that the living environment of that alien civilization was very harsh, so people sometimes chose to completely dehydrated themselves to survive this stage, waiting for their companions to resurrect them.
He remembered that much because he had watched it too long ago. The plot might have been a little messed up.

Answer 1

The name of this science fiction novel was " The Three-Body Problem " and the author was Liu Cixin. The series of novels about the interaction and conflict between humans and alien civilizations was a science fiction novel with great imagination and depth. The series of novels had been translated into many languages and received widespread praise and popularity around the world.