Doomsday Wasteland: My Shelter Can Be Upgraded

At the end of the 21st century, a spacecraft that could not be observed by lower-level civilizations appeared near the outer space where Blue Star was located. "According to the Universal Convention on the Universe, implement Plan 3 for this civilization: the Civilization Re-enactment Plan! Do you want to implement it immediately?" "Execute!" The spacecraft then emits a red light towards the blue star. When it approaches the blue star, the light suddenly spreads across the board, like a huge protective shield, surrounding the satellites in the orbit of the blue star and falling towards the surface of the blue star. The spacecraft then slowly disappeared. At the beginning of the 23rd century, all the people of Blue Star woke up from their slumber...