Ultimate Antihero - Volume 4, Chapter 4

Losing his parent early on, he had to survive in a world he couldn´t even see… Blind and left alone, he was seen as a parasite by the social hierarchy of the new ages filled with martial arts and soulbonds

As long as the land is square, Yan Bicheng should divide the world into four parts.
The dark organization “Ruyimen” has abducted children for many years, trained them as assassin agents, and sent them to the families of various countries for use in order to collect a lot of secrets, and gradually extended their evil hands to the court.
Feng Xiaoya, the favored minister of the King of Yan, suffers from bone melting disease. She is unparalleled in her “sickness and beauty”. For some reason, she abandons the eleventh wife, Qiu Jiang, and puts her under house arrest in the mountains. Qiu Jiang, who has forgotten his past, fled alone on a stormy night. After several twists and turns, on the way back, he met Yi Fei, the third prince of Cheng who was in trouble in a foreign land.
One wants to regain memory, the other wants to regain the throne. The two people who are incompatible with each other walk side by side towards Cheng in a bloody storm… but they find that the Ruyi Gate, which has been entrenched in Chengjing for a hundred years like a poisonous snake, seems to have undergone an unknown shock… …
The situation of the Four Kingdoms is back, and there is only one goal – to eradicate the evil organization Ruyimen!
However, as Qiu Jiang’s memory slowly recovered, a unparalleled secret finally surfaced…
Mrs. Ruyi, who is it? There is another mystery behind Ji Ying’s death?
What is the purpose of this return journey after a narrow escape, and where does it go?

- Description from novelbuddy

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.

Suddenly, the mysterious book I received turned out to describe my own life?Once I chose to change my destiny, the life within the book changed as well.In the book, I encountered insincerity, spent ten years behind bars, and witnessed viruses laying Siege...Cancer, bus plunging off cliffs, plane crashes, senile dementia ... even the end of days – a variety of deaths; was this fate's punishment for the rebels?No one is a hero; it is just that this disaster-ridden fate forcibly made me into a warrior charging into battle.Those who killed me over and over will ultimately make me stronger!Through numerous life simulations, I amassed wealth from the financial markets, rescued innocent girls from felons, and acquired advanced technology from the future...Although I always encounter various disasters and accidents, I still strive to flutter the butterfly's wings, changing my original fate little by little.After countless simulations, the world too embarked on a completely different path.However, where did this autobiography come from?Behind it all, what kind of unknown conspiracy is lurking...[A literary man's laid-back daily life of unlimited simulations to save the world]