Apocalypse: Where Did This Train in the Bathroom Come From?!

[Apocalypse + train + System + transmigration + zombies + wasteland + gore + no female lead + dark, no saintly heroics + rebuilding an apocalyptic refuge] “Wait, I haven't even wiped my ass yet! Where the hell have you dragged me?!” Du Yu is on the toilet, “creating life,” when he is dragged into the world of Yuanxing before he can even pull up his pants. Before he can figure out what's going on, the train's enforcers haul him off to work as a “slave” miner for several days. Yuanxing is a world crawling with zombies, where all of humanity struggles to survive aboard constantly moving trains. The trains run on Yuanxing's unique iron ore, copper ore, stone, wood, and other resources, which provide power and the means to produce food. Survivors mine for the train conductors in exchange for food and their protection. The conductors use these “ores” to upgrade and strengthen their trains, one step at a time. When Du Yu drives his disaster-class train, tens of thousands of meters long, roaring unchecked across the wasteland, hundreds of millions of zombies are torn to shreds. “Bro Du, there's a level 10 zombie up ahead. Shouldn't we avoid it?” “Where'd this speed bump come from?!” “We're all doing our best to survive...” The Dawn City he builds becomes the only “beacon on the sea” in the world of Yuanxing.