The Rebirth of the Cultivation Leader Qin Zhao as a Celebrity - Chapter 393 - 391: Taught a Lesson...

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

A 21st-century tech manager, accidentally thrust into the body of Emperor Commodus—yes, the infamous villain played by Joaquin Phoenix—has one goal: not to die like him.Armed with his wits and a hyper-intelligent AI on a solar-powered laptop, he must navigate the treacherous politics of ancient Rome. Everyone, including his own sister, expects the arrogant, decadent tyrant. Instead, they find a calculating reformer. But as he tries to avert the fall of the empire, he discovers that being a “good” emperor might be even more dangerous than being the monster everyone is waiting for.

A novel adaptation of K, focused on the history of the blue clan and the events which led to Munakata Reisi’s appointment as the current blue king.