I Have a Doomsday Containment Train

[Welcome to the Doomsday Containment Train, you will spend the rest of your life with this train in the following days] The end of the world is coming, unknown beings pollute the world, and ancient mysteries quietly revive. Human beings have to retreat to underground shelters and hand over the territory that once belonged to them to others. "But what if I had an awesome train that I could upgrade?" Chen Yu woke up with the train he built in the game, bringing a nascent fire to this crumbling world. Farming, industry, and trading, this train has very user-friendly functional areas. If you have any dissatisfaction, passengers are welcome to come face-to-face. War, fire, steel, there are guns and cannons in the world of terror. I can't say who feels the terror. Control, contain, protect, have you seen these small single rooms? Yes, walk in and work, and a new day will begin immediately. Chen Yu, who was driving the train, couldn't understand why he had just traveled around the world, how could he become the savior?