Cold-blooded Undercover Master - Volume 1 Chapter 1125 Old Poison King

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.

When the heavy curtains of night descended, darkness fell upon the earth. What will later be known as the dawn of the “Dark” era, humanity once again unfolded a new path of evolution. While retaining the memories of surviving ten years in the apocalyptic world, Ye Chen awakens back on the very day the disaster struck; all he can do is protect the people dear to him, and then….

With the might of an ant, set foot upon the pinnacle of this world!

The people lost in the thralls of everyday life, aimlessly struggling for survival in this world, move forward; there will surely be a path only you can open….

- Description from Novelupdates

She was originally a daughter of a thousand gold, but who would have thought that her father would be demoted to the south of the Five Ridges once. Start with a dilapidated house, nothing you want!

A broken house is a broken house. A family working together is better than anything else. Zhao Liya took her parents, brother, sister and righteous brother to open up wasteland and farm, and make a fortune. There are treasures everywhere in Lingnan. If you work hard to start a business, your life will become more and more prosperous.

In the process of working hard to farm and make money, she met a very compatible partner. She pointed east, and her partner would never go west. She said that she would go to the sea, but her partner would never go up the mountain. Making spices, opening a restaurant… My partner said: “Good!”

Zhao Liya is very satisfied, give her another fight with such a partner!

Partner: “Not good! Just me is enough!”

Later, when the partner’s identity was exposed, Zhao Liya clenched her fists, “It’s really enough to have you alone!”

- Description from novelbuddy

When he woke up, Chen Xiao, a tech elite business genius, was reborn in a parallel world in 1999, another self standing at the gate of the college entrance examination.

This year……

OICQ was just born, and Goose Factory employees pretended to be girls and chatted with male netizens. Ma Yun was regarded as a liar and was forced to leave Yanjing to start a business in Suzhou and Hangzhou. Li Hong rented two rooms at the Yanjing Hotel and discussed the prototype of whiteness…

This year, Chen Xiao took the black technology guide of the future world, from social software to domestic systems, from domestic chips to artificial intelligence, from new biological energy to DNA remodeling to fight cancer; from quantum technology to anti-gravity engines…

He won the title of “Forbes” and dominated the global media. He suddenly found that he had accidentally changed the world.

- Description from novelbuddy