God Level Demon - Chapter 14 - Crazily Publicizing

The person that Pei Zhen hates most in his life is the perfect Fu Sichen. Alas, life is full of surprises and unpredictability. One fine day, an accident turns Pei Zhen into Fu Sichen’s pet cat! As Fu Sichen’s pet cat, he makes a shocking discovery about his sworn enemy – a deep dark secret that the perfect Fu Sichen has kept hidden for years. Trapped in his cat body, Pei Zhen moves from one adventure into another while trying hard to find a way of turning back into his human self. When he finally does, the world as he once knew, has become a completely different place!

A surgeon accidentally got the blessings of a system, shocked the medical industry, and rejuvenated countless people.

- Description from Novelupdates

A dangerous neon-lit city in a shattered post-war world.

The wilderness outside the city was wild and uncontrolled, the superhuman roamed beneath the cover of the night’s rain, xenomorphs prowled the streets.

Oligarchic company, extraordinary program, prosthetic limbs, spiritual network, street gangs.

Gu He only desire after transmigrating was to become a salted fish. But even if you wanted to, you couldn’t.

- Description from Novelupdates

Crossing to One Piece world, he became Roger’s younger brother.