Back Before the End of the World, I Have a System to Help

Everyone said that Xie Miao was a waste for learning prediction, but she finally escaped with the help of prediction. Semyon, who escaped from the destroyed earth, is a space merchant who roams the world. When she dealt with a black crystal stone sold by the cult, she returned to twenty years ago. Two years later, the Tiangong space station crashed, and people who lost air control were gradually forced underground.