Weird Apocalypse: My Candy Shop Can Be Upgraded

Three years ago, "Red Mist came", strange things (not zombies, but twisted, rule-based monsters) were rampant, some physical rules were invalid, the human population was directly halved, and the remaining people were huddled in the safe zone/fortress. At this time, Chen Fayang in another world was suddenly tied to a food system to open a shop in another world.