The Editor Is An Extra - Chapter 37: The Fate of Extras

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.

The most unexpected weird destiny,
The most intense brain collision,
The cruelest battle of life and death,
The craziest bizarre fantasy,
The most bizarre truth …
It’s the first time, and another ten years!

- Description from Qidian

A poor orphan, who lost both parents, stumbles upon a mysterious space and embarks on the path of cultivating immortality. From then on, he cultivates spiritual herbs, refines immortal pills, opens a shop, practices military formations, and establishes an immortal kingdom…This story is about cultivating immortality and farming, with a focus on ordinary people, not horses.

The Sect Leader has taken in a new female disciple.She is very beautiful, causing countless people to be enchanted by her.Until Zhou Qing finally activated the entry, seeing a golden tag flashing above many people's heads.According to the hint, that was others' inner notes about him.The chief of the neighboring peak's note on him was [A lecherous pervert playing dumb chicken].Yan's note on him was [Junior brother who is both lustful and daring].Shi Zhen's note on him was [Junior brother Zhou with worsening sleepwalking condition]…When Zhou Qing looked at this new junior sister, her note was[So handsome][So powerful][So domineering].At this moment, it could basically be confirmed that she liked him.So, Zhou Qing gathered the courage to confess.“I... like you.”But she laughed heartily: “Dad, you were so funny when you were young.”