The End of the World: I Can Upgrade My Shelter

Global disasters are coming, alien beings are invading, catastrophes are devastating, various viruses are rampant, and alien races are attacking. All kinds of apocalyptic catastrophes are taking turns. Zhao Jing, who has been reborn with a fortress system, how can he build his own super shelter in only one week? From a caveman to a planet lord, let's see how he turns things around and conquers the vast sea of ​​stars.