Traveling Through the Apocalypse: a Double Door at the Beginning

Chen Fei traveled to a wasteland world where mutant beasts were rampant. There are evolvers injected with genetic medicine here. There are prosthetic transformers who replace mechanical limbs. There are half-orcs who have been transformed into alien beasts. There are also ancient martial arts sects that are still surviving. And he was just an insignificant low-level scavenger. Fortunately, he had an extra double door in his mind. Through the double portal, he can enter a different world where martial arts is prevalent and become a player. Here, he can take on quests and fight monsters to upgrade. Therefore, Chen Fei brought firearms to fight monsters in another world and upgraded them, and then used powerful force to kill everyone in the main world. He is a peerless genius from another world and a guide to ancient martial arts in the real world. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.