Global Crisis: Start a Check-In System

When they wake up, billions of people around the world enter a survival game. There is a lack of water and food, and disasters keep coming. Surrounded by strange beasts, everyone is unable to protect themselves, and a large number of people die every day. Fortunately, Ye Yu has a check-in and doubling system "Congratulations, you signed in and received a Desert Eagle pistol*1" "Congratulations, the income has doubled this time. Congratulations to the host for obtaining low-level crystal core*100" While others had just begun to expand their territories, Ye Yu had already conquered a hundred miles in radius and began to conquer other worlds!