Runeblade - Chapter 11 : Unpleasant Surprises

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.

After facing her fiancé’s betrayal, things take an unexpected turn after Tang Mo’er inadvertently gets involved with the Capital’s preeminent magnate, Gu Mohan.

Fast-forwarding, Tang Mo’er clenches on a pregnancy test kit with two red lines—testing positive—and confronts him. “Young Master Gu, why did you make me pregnant?”

Gu Mohan hands a baby over into her arms. “My dearest wife, be good. That’s our second child.”

And so Tang Mo’er can only hustle and take care of her two children, but unbeknownst to her, Young Master Gu has also been coveting her love and affection…

This is a face-smacking, sweet-love novel set in the entertainment industry.

- Description from Novelupdates

Xia Mi traveled to a classic JRPG game and became a villager in Xinshou Village.

My biggest wish is to save money, then marry a woman from another race, live a safe and worry-free life, and finally die in bed.

On this day, the brave men defeated the Demon King.

【Name: Xia Mi】

[Occupation: Villager]

Added: [Occupation: The new heir to the Demon King]

[Devil King act quickly! Kill all the heroes! Revive the glory of the demon race! 】

Wait, is this a mistake?

In Xinshou Village, besides farming every day, Xia Mi, who is serving as a background board, suddenly has an additional identity board.

He is just a novice villager!

“Where is the devil king! Where is the devil king!”

The news of the Demon King’s birth spread throughout the mainland. Every brave man who came to defeat the Demon King could see a steady stream of monsters in Xinshou Village, but he never saw the Demon King.

Villager of a certain Xinshou Village: Demon King? I’m a farmer, so I really don’t know.

- Description from novelbuddy

Well-known Composer Fang Zhao was in the glorious stage of his career, when the Apocalypse arrived; After finally experiencing the bitter difficulties of a thousand dangers, when the Apocalypse was simmering down to an end, he collapsed; When he opened his eyes, he was reborn in a New World, 500 years after the end of the apocalypse, in the body of a student who had been dumped barely after graduation, who had been cheated of his hardwork barely after he started working…

The World of the Future, Virtual Idols PK Real Idols

“Every time background music plays in my head, I feel like there is nothing to be afraid of.” —Fang Zhao

Toward the end of the apocalyptic period, Fang Zhao lost his life. However, instead of dying, he found himself 500 years later in the body of a young and aspiring composer who shared the same name. Having received a second chance at life, Fang Zhao sets out to achieve the previous owner’s dreams.

Armed with the experience of living through an apocalyptic age and his profession as a composer before that period, Fang Zhao uses his talent, wits, and knowledge to make his mark in the entertainment industry of the future.

- Description from Novelupdates