Perfect Villain Life: Universal Job Change - Chapter 23 - A Chance to Turn the Tables on Qin Xian?

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.

Jiang Zhen crossed into ancient times and became the old bachelor eldest Jiang who was neglected by the whole family in the village of Jiang Xihu in Hexi Village.

He was born into a good family and Jiang Laoda is busy in the year but can’t eat a full meal. Two younger brothers can marry a wife, but he is starved to death… Jiang Zhen feels unbearable.

Don’t want to feed me? OK, I kill the chicken myself.

Don’t you give me a glimpse of food? It doesn’t matter, the door of the granary will be opened as soon as it goes down.

Want to tell me that I am not filial? Ok, I immediately took the knife into the county to slash people, and let the county grandfather grab all of us.

Jiang Zhen took the attire of the family’s best products and became a tyrant in the village. He also saw the “ugly” ger who could not get married in the village.

Future father-in-law: “Jiang Zhen is always wandering around our house. Isn’t it necessary to grab our house?”

The future mother-in-law: “What to do, Jin Geer must not beat him!”

Zhao Jinge’s face is hot… Dad, the wild rabbit that I got back today is what he gave…

- Description from Novelupdates

My whole life, all I wanted was power.

I churned the world into rivers of blood and eventually gained the title, “Demon Lord of Strength”. However, all this became useless when I lost to a party of heroes.

But what can a loser say? As I laid dying, I was forced to listen to the hero’s gibberish:

“If you are born again, I hope that you will live a kind life!”

But huh? When I opened my eyes again, I was back in the past.

“What do I have to do to live a kind life?”

This is the beginning of an ex-Demon Lord’s journey to live a kind