Echoes: the Broom of Civilization

A message from billions of years ago, an upcoming catastrophe of the universe. In 2075 AD, Lin Xing, the chief geologist at Mars' "Yinghuo Base", accidentally triggered an ancient message - an echo - buried deep in the rock formations of the red planet. This incomprehensible torrent of information instantly flooded communications throughout the solar system, dragging humanity into the abyss of the "Great Silence." However, crises can also be opportunities. When humans woke up from the initial panic, they discovered that this "echo" was not a prelude to destruction, but the entire legacy of a long-extinct super civilization - the "Collection of Thinkers" - including technology beyond imagination, magnificent art, and a cold warning: a periodic cosmic disaster "civilization broom" that is capable of destroying star-level civilizations is heading towards the solar system. Wisdom, art, history, emotion... Everything in human civilization, under a certain supreme law, is just garbage accumulated in a corner and needs to be cleaned up regularly. The countdown has begun. Facing this ultimate test, human civilization that has acquired new technologies has reached a crossroads of division: The Voyager faction vows to inherit the fire of exploration, build magnificent starships, sail into deep space, and find a new home. The Watchers chanted the oath of protection, determined to devote all they had to transforming the galaxy, sticking to their homeland, and coexisting with the Earth. Heading towards the stars and becoming an eternal traveler? Or should you stick to your homeland and be a desperate defender? Can they solve all the mysteries before the countdown reaches zero, transcend the footsteps of the pioneers, and find a way out for themselves and the fate of the earth?