Renegade Immortal (WN) - Chapter 2070: You Are Situ Nan

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.

Lin Wanwan is a pitiful mentally-disabled girl. Not only does she suffer abuse from her stepmother, her stepmother even attempts to use her as a sexual commodity to pleasure others. Eventually, the poor Wanwan dies from an overdose…

Sui Yan was a villain, at least that’s what everyone thought.

Her childhood friend and brother said: “Sui Yan, you’ve changed and become more and more disgusting.”

Her best friend said: “Sui Yan, stay away from me. I don’t want to see you again.”

Her stepsister said: “Sui Yan, I hate you.”

Her two biological brothers said: “Sui Yan, we don’t have a sister like you.”

The one she loved the most said: “Sui Yan, I could never like someone like you.”

Sui Yan died. Even though it should have made everyone happy, it made them so heartbroken they could barely breathe.

In the blink of an eye, everyone mysteriously returned to the year Sui Yan was four years old. From then on…

This is a world where a king is the most powerful.