Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 1 - 1-5. Fortress City Life Begin!

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates

Zixu woke up to find himself in the world of *Naruto*.Too weak to survive? No problem—he has the Kaido template.Unfamiliar with the *Naruto* world and clueless about ninjutsu? No worries—devouring Sarutobi Hiruzen's soul will take care of that.Caught in the constant battles between ninja villages and struggling to protect himself? Simple—just start his own teaching faction.Lacking manpower? Short on talent? Easy—swing the hoe well, and no corner is too deep to dig.

Qin Tao, the famous ship chief engineer, went back thirty years ago to the Mingzhou Shipyard that he had abandoned. Everything will start all over again!

The factory manager and the cashier ran away with the money? Qin Tao made a move to get a bucket of gold. Speedboat not fast enough? Then hang more engines! Can’t the wings of Hongqi 61 be folded? Qin Tao will solve it!

Dredgers, LNG ships, catamaran missile boats, stealth frigates, Aegis air defense ships… Let’s see how Qin Tao casts a warship of a great power step by step!

- Description from novelbuddy