I Really Didn't Mean To Be The Saviour Of The World - Chapter 69 - 68:1 Can’t Even See the Tail Lights of a Middle School Student_l

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.

The story is about a man who’s opposed to the now-common practice of implanting false memories, but is one day given memories of a fictional childhood friend. This fabricated happiness torments him, but then, to his surprise, he meets her – a girl who shouldn’t exist.

Mo Han was in a tough spot. His daughter, Chen Chen, needed a lot of money, three hundred thousand, for an operation to treat her leukemia.He didn't have the cash and didn't know what to do. So, he tried to come up with some sneaky plans near a bar, hoping to raise the money that way. But things went from bad to worse when an old classmate who had rejected him in college caught him red-handed. She made fun of him and made him feel even worse.When Mo Han's wife, Luo Ning, found out about the situation, she rushed over with Zhang Hao, who had a crush on her. But instead of helping, Luo Ning shocked Mo Han by suggesting they get a divorce! And just like that, she left with Zhang Hao in a car, leaving Mo Han feeling alone and confused.After a night of heavy rain, something amazing happened to Mo Han. He unexpectedly inherited something really special from someone called Ye Lingfeng, a fallen medical expert. From that moment on, Mo Han's life took a turn. He decided to take charge of his own destiny and set out to change the world, no matter what challenges came his way.

Programmer Li Daochong desperately develops the game code, dying. After waking up, being born again in a ghost-invading future comprehension world, isn’t that a pothole?

However, Li Daochong brought his own ghost upgrade system, which made my green onion. Others are devilish and scared, and they rush to hell. Hey, isn’t this the tip of China? I want to eat, drool!

Eating is not the most important thing. The key can be upgraded. How many levels does it take to finish?
　　
“Li Daoyou please stay, people want to go to the edge of the magic field on the edge of the magic field, can you accompany others? People are afraid!” Hongyang fairy is dripping at Li Daochong.

“Li predecessor, can you please go with a younger generation to go to a ghost dragon?” A white-haired girl who is more than two hundred years old can look at Li Daochong helplessly.

- Description from uukanshu (translated)