After the Fake Young Lady Stole Everything from Me, I Became the World’s Sweetheart - Chapter 414: Four-Hundred and Fourteen: Lesson

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 orphan Sun Chan was abandoned by her first love. Her foster mother and sister sold her to the village drunkard, where she endured endless torment and ultimately died from exhaustion in the cornfield. After awakening, she returned to being seventeen years old. She vowed to leave the village this life and carve out a new world for herself! Family, friendship, and love, she will strive for them all. Hey, soldier brother over there, why do you keep looking at me?

I was reincarnated into another world, and I’ve brought the Horadric Cube from Diablo II with me.
Being a knight is cool and all, but being a wizard is pretty neat as well.
So, which one will it be?

- Description from Novelupdates

Li Che had transmigrated and, after living nineteen ordinary years, he opted to accept his fate, marrying and having children, striving to support his family.But the moment his daughter was born....Through his daughter, he rose in status, and his life was no longer ordinary....With his daughter’s safe birth, you gained a Dao Fruit, “Immortal Artisan”.When his daughter turned one, safe and sound, you gained the Dao Fruit “Dragon Elephant Vajra”.At his daughter's age of two, free from illness and disaster, he gained a Dao Fruit, “Pure Heart”.By the time his daughter was three, lively and clever, he gained a Dao Fruit, “Chess Saint”.His daughter was four, five, six years old.......Li Che discovered that with each passing year of his daughter’s age, he could condense a Dao Fruit to enhance himself.From then on, Li Che harbored a simple and unpretentious wish.A Dao Fruit a year, quietly safeguarding longevity.As a father, he only wished...Starting from the warmth of his wife and child by the hearth, to peacefully protect his daughter's immortality.Silently condensing countless Dao Fruits.Henceforth cultivating his spirit, invincible between heaven and earth.