I Just Returned from Another World, and It's Already the End of the World

Bai Yunhang had just returned from another world, only to find that a wave of corpses had broken out in the world and was on the verge of destruction. In order to save his hometown, Bai Yunhang had to use all the abilities he learned from other worlds. Come on, monster, let you see how strong I am after returning from studying abroad! Ps, the protagonist is invincible, there may be one female protagonist or no female protagonist, there will be no virginity or indiscriminate killing. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.