Build a Post-Apocalyptic Oasis City

After the end of the world, all social order and moral systems collapsed. There is no right or wrong in the wasteland, only life and death. Wandering slave traders, survivor organizations in shelters, official institutions in distant places, isolated cruise ships in the ocean... Zhao Yao traveled through time and activated the oasis system. As long as he saves people, he can earn salvation points every day and upgrade any items. [Aircraft model → Quad-rotor drone → Unmanned reconnaissance aircraft → Smart...] [Fire ax → Alloy battle ax → Chain saw ax → Power ax →...] Even if the world falls, Oasis City will still be a paradise.