I Became a Villainous Character with a Limited Lifespan - Chapter 74

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.

Once, because of a pair of purple eyes he was scorned. He is a wangye known across the land, cold and bloodthirsty, looking disdainfully upon the world.

Lu Changsheng, who traveled through time and became an apprentice in the Miaoshou Garden, originally wanted to work hard to be a generation of genius doctor who can help the world. But when he started to practice martial arts, he found that every time he practiced a martial art to perfection, he could improve his understanding.

Moreover, understanding seems to be able to improve all the time. Lu Changsheng wanted to know, where is the upper limit of comprehension?

Unremarkable: Slightly better than crap.

The posture of the middle man: obscuring everyone without knowing it.

Possesses great potential: Xiao He has just shown her sharp corners.

Qianlong in the Abyss: Flood Dragons Come Out of Shallow Water!

Praise from all sides: Show your sharpness, unstoppable!

Dragon and phoenix among men: The name of genius spreads all over the world!

Praise for centuries: Founding a sect and establishing a sect, calling the sect and being the ancestor!

A born sage: astonishing the past and the present, unsurpassed!

There is no one in all ages: there is no one before and no one after!

Top savvy: unspeakable, unseen, unheard!

…

The finished volumes of “Mage Profound Truth”, “Eternal Martial Arts”, “Longevity Seed”, “Old Master” and “Survival Seed” are all excellent works, produced by Lao Yue, they must be excellent!

- Description from novelbuddy

Power and desire, money and strength, conscience and responsibility, the road ahead is at a loss, as a time traveler, Simon, where will he go, this is a leading mainstream novel with a relaxed daily life and a slow pace

- Description from novelbuddy