Doomsday Farming: Unlimited Island Upgrades

Su Fan was reborn on a 1,000-square-meter island. There is no * at the beginning, only infrastructure. The island system has been activated. There are still 90 hours until the end. Please upgrade the island as soon as possible before the end to resist attacks. ... Level 1 Doomsday: Global Catastrophe. Level 2 doomsday: The monster awakens. Level 3 doomsday: alien invasion. Level 4 doomsday... When others live a life of having one meal but no next meal. Su Fan had no worries about food and clothing on the island, and had a constant supply of maids. When others are hiding at home and afraid to go out. Su Fan drove his tank around to pick up airdrops from time to time. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.