In "My Black Technology Shelter," the protagonist, Lu Chen, held the nano-core three days before the apocalypse and began to self-learn. Through the nano-core, he realized his own ideas step by step and finally developed black technology. During the impact of the meteorite, he was frozen for hundreds of years. When he woke up, he found that he had obtained spatial abilities. I hope you like this fairy's recommendation. Muah ~😗