Open a Street Stall and Sell Vigorously - Chapter 42

After spending half a year in the province, Cheng Yang took a luxurious cruise for seven days.
Accidentally hooked up with a CEO on the way.

Later, Cheng Yang found out that he was pregnant.
Just as Cheng Yang was preparing to secretly give birth to the baby, it was a coincidence that he fell asleep in the big president’s bed.

It’s impossible to run with the ball, his man is handsome and rich.
Must cling tightly and can’t be torn down.

- 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.

Ha Si-heon is a brilliant but obsessive Wall Street financier who has built an immense fortune driven by a fear of financial insecurity. After enduring a tragic childhood, losing his mother, and navigating financial ruin with his father during South Korea’s 1997 financial crisis, Si-heon immigrates to the U.S. He fulfills his father’s wish by becoming a doctor but finds himself drawn to the lucrative world of Wall Street.At a top hedge fund, Si-heon leverages his medical expertise to dominate biotech investments, thanks to an unusual ability to predict successful FDA drug approvals. He amasses wealth quickly, yet struggles with a pathological fear of spending money. His relentless pursuit of profit takes a dark turn when he’s diagnosed with idiopathic multicentric Castleman’s disease (iMCD), a rare, life-threatening immune disorder with no cure. His condition worsens despite aggressive chemotherapy, as the lack of research funding for this “orphan disease” leaves him without options.Just as Si-heon faces death, he miraculously awakens to find himself transported 10 years back in time, to the beginning of his career on Wall Street. Realizing he has a second chance, Si-heon is determined to not only reclaim his wealth but also amass enough money to fund a cure for iMCD. The story explores themes of greed, ambition, mortality, and redemption, as Si-heon seeks not just to survive but to redefine the meaning of his life.

Just as a gamer found an overpowered skill book called ‘Item Upgrade’ in the hottest virtual reality role-playing game on Earth, something happened to the game’s system, causing his soul to leave his body and go to another dimension. Common sense dictates that he would be born anew then become the greatest overlord of this world by making use of his advanced knowledge. Not in this case! He was already dead. Only some fragments of his soul and that skill book managed to get into that dimension and merge with an ordinary common youngster called Bai Yunfei.

This was the enormous Tianhun continent, where humans could be said to have no limits. There was a group of humans here who could cultivate the power of their own souls then control their bodies, the natural elements and even other people’s souls with that power! These special beings were called — soul cultivators. Come witness how the several fragments of the dead inter-dimensional traveler’s soul and that skill book, which was not governed by the laws of this plane, were going to help Bai Yunfei become a legendary soul cultivator and craftsman!