Chasing You Like a Tenacious Falcon - Chapter 4: Brother, Borrow your meal card.

Yuki, a high school junior, dies heroically saving a stranger and is reincarnated in a fantasy world, where he discovers an extraordinary and unrivaled power.

The main character Lei Yu does not have the ability to practice his family’s martial arts. He gets stepped on and tossed around. Due to certain reasons, he leaves the family, coincidentally gains an ability, and makes his own path to becoming an immortal.

- Description from Novelupdates

What would happen if an ordinary guy on Blue Star became a Superman?Traversing between worlds, Lu Yao becomes the only one with extraordinary powers. He studies cultivation in the other world, and bring them the technology of his planet. Now, he is the only superman in both worlds.A small goal— to withstand a nuclear bomb~

With the revival of spiritual energy and the breakdown of the order of species, it is a difficult test whether human beings can still stand at the top of the biological chain.

(There is already an old book, The Strongest Descends in the City, you can read it.)

- Description from novelbuddy