Can’t Take My Eyes Off You - Chapter 13: It’s Just Four Years

In the Tranquil Sun province of the empire, there exists an unremarkable lordship known as Xue Ying Territory! This is the home of the Dong Bo clan, the clan of our hero Xue Ying!

His father, a commoner turned noble; his mother, a noble who abandoned her clan for love, and his brother, an innocent toddler. But peace cannot last forever, Xue Ying’s peaceful life is shattered, and the only way to reclaim it is through power!

- Description from novelupdates

In Ten Heavens Domain, full of respected powerhouses, juvenile Ling Tian accidentally obtained a mysterious iron sword. He refined the Supreme Martial Dao, studied the Divine Spirit Array Laws, fought Ten Thousand proud and arrogant Heavenly Clans, and was undefeated! Seven Feet Sword Tip sweeps away the world, within the Ten Heavens, I am the Supreme God Monarch!

- Description from Novelupdates

What kind of experience is it to travel through time and become an AI?

Li Wenyuan, who was hit by the meteorite, successfully experienced this feeling.

Fortunately, he discovered that the planet he controlled… seems to be a little bit special.

“Precious living metal? Any wall here is living metal!”

“Zello? You said that omnics don’t need this? Sorry, psionic machines are being produced.”

“Interstellar colony? Isn’t it good to build a ring world?”

This is a story of farming, and it is also a story of human exploration of the universe from the past.

There are space wars, interstellar adventures, civilization observations, and galaxy epics.

“So…” A few years later, facing the disaster that was about to sweep across the entire galaxy, the unmanned fleet controlled by Li Wenyuan stood up helplessly.

“They all think that I am a lost empire, and I can only do what the lost empire should do.”

PS: space opera

- 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.