"The first element of civilization is survival". Without the favorable living environment of the earth, the existence of three-body galaxies has been suffering from the cruel alternation of chaotic times and constant times, and it is in danger of being destroyed at any time. In order to survive, they must find a new home, and exposing the coordinate earth has become their primary goal.
There were twelve planets in the three-body galaxy, eleven of which were swallowed up by three suns, and the last planet will be swallowed up in 150 to 2 million years. After countless times of destruction and rebirth, the only way out of the three-body civilization is to fly out of the three-body galaxy, find a new home, intercept the earth signal, and give them a chance to start the process of cosmic colonization. Three-body civilization uses scientific and technological means beyond human civilization to lock in earth science and monitor everyone's every move on the earth.