They Said I’m Mr. Gu’s Scandalous Affair - Chapter 73 - : Good Afternoon, Lady Boss!

She, a hidden technology boss, is obsessed with blood and kinship. She died tragically in a previous life and has a new life. She just wants to protect her true relatives!

?

?? He, the Emperor of Dark Night, glanced at her inadvertently and caught a glimpse of her stubborn appearance with tears in the corners of her eyes. Since then, he has embarked on the road of pampering the girl, and he will never return!

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But who knows, the Jiaojiao girl in her arms is a real all-around boss.

The boss of the world’s No. 1 chaebol: “Is there any order for Miss An? The little one is willing to help Miss An.”

Dean of the Global Research Institute: “Miss An, I heard that you like the sea, I bought ten islands for you…”

The world’s number one hacker: “What? Someone bullied my boss? Hehe, courting death!”

The world’s first medical doctor: “Miss An, do I have the honor to come to your twentieth birthday party?”

…

When luxury cars came to the capital and the big guys lined up to greet the girls of the An family, the world shook, and the whole world was shocked!

- Description from novelbuddy

If I were to fall into a game, I wish I would fall when I was young.

It’s a affair between a loyal dog servant and his master.

- Description from Novelupdates

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.