The Scum Villain’s Self-Saving System - Chapter 27

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.

A teen is summoned to another world as the Hero. It turns out the Hero can power up women with his cum.

Lin Zheyu transmigrates into an ancient world and becomes a storyteller to make a living. After being robbed several times, he decides to learn martial arts for self-protection.However, during one of his conversations with his master, Lin learns that this world is home not only to martial artists but also to demons.

A 19-year-old young lady came to the Jiang family, a prominent family in Sea City. Rumors had it that she rescued the Jiang family’s madame many years ago in the countryside. After she enrolled at Sea City University, the madame took her to the Jiang family’s residence before school started, claiming to familiarize the lady with Sea City’s environment.

It was said that that the young lady was an orphan who grew up in the countryside. However, she carried herself in a manner that befitted a rich young lady from a prestigious family, more so than the real rich young ladies.

It was said that the young lady had not seen the world and was not presentable. However, she maintained her composure in front of the bigshots from all walks of life. She maintained a proper smile that made people look askance.

It was said that the young lady was brought home by Old Madame Jiang to be Young Master Jiang’s wife.

It was said that the young lady came from too humble a background and was not fit to marry into the Jiang family.

It was said that the young lady fell in love with the young master of the Jiang family at first sight, but the young master of the Jiang family did not care about her at all.

…

First meeting.

She sat by the lotus pond in the Jiang family mansion as she read a book.

Even though she was in a simple outfit of a white T-shirt matched with black pants, he saw the charm of a beautiful lady.

She exuded the aura of a young lady.

First meeting.

Her book fell. He called after her.

She turned around after hearing him.

At that moment, she suddenly understood what “a man as beautiful as jade” meant.

He was a bright gentleman who was as gentle and beautiful as jade; she was an elegant young lady, reserved and upright.

If someone asked her what her greatest gain in coming to Sea City was, she would answer without hesitation, “Meeting him.”

If someone asked him what his greatest gain in staying in Sea City was, he would answer without hesitation, “Meeting her.”