Doomsday Survival System? Fortunately, I'm Not at the End of the World

The system went crazy... And asked me to use a toilet plug to block my roommate's mouth... How to solve it? Waiting online, very urgent. One day, Xu Xiao found that he had accidentally awakened the system. It's not a grand prize, it's not a lottery, it's a doomsday survival system. [Survive 24 hours surrounded by zombies] Build a shelter [Collect ten blood samples of zombie viruses for analysis] System tasks popped up one by one, and Xu Xiao's mood rose and fell again and again. [Congratulations to the host for completing the mission, the reward has been distributed. "No, buddy." Xu Xiao felt that something was wrong: "Are there any zombies in the current world?" Oh, it turns out that everyone around is considered a zombie, so that's okay. —— Many years later, when someone asked Mr. Xu Xiao, the greatest philanthropist in the world, how he achieved success. Mr. Xu Xiao said: "Three points of hard work, three points of state of mind, and ninety-four points of luck."