Master Zhan, Calm Down! - Chapter 2614 - : -

I have experienced all the eight sufferings of this world.

I do not ask for nirvana, but for you.

Wild and hard-to-tame demon (gong) x cold, ascetic and childish immortal (shou)

- Description from Novelupdates

In the foreign world, the martial artists dominate the world and the sword of the emperor controls the fate of hundreds of millions of lives! Long Yu, the number one killer on Earth, after dying, takes rebirth in this new world in an aristocratic family of martial artists but faces rejection because he is unable to practice martial arts.

The gods of the divine realm are hypocritical, and the evil souls master dominate the human world.Both the soul beast race and the human race are like grass.Su Yu emerges from the mundane world, stepping over countless evil bones, ascending to the supreme divine throne.With ice sealing the false Gods, and the God King’s seal ruling all beings.PS1: No fawning over Tang San, no fawning over Huo Yuhao, and the protagonist is not a nanny.PS2: The setting is based on Douluo Dalu 1-3 and Divine Realm Legends, not adopting the Douluo Dalu 4 setting.

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.