Meteorites fall from the sky, the sun is out, and in a snowy land, scattered shelters are scattered among them. Lu Chen holds the nano-core, starting from self-study knowledge, using the nano-core to realize his thoughts step by step, developing technology, striving to survive, and finally being able to Whether to enter the starry sky. The story begins three days before the meteorite falls. PS: The beginning of the disaster story is similar, but the content is different