Be A Son-in-law After Cultivating Immortality - Chapter 24

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.

Ethan was betrayed, he was broken, left crippled by those he trusted most: Zachary and Ivy, the people who ruined his life. Stripped of everything, Ethan crawled through three grueling years in the abandoned depths of despair, desperate to regain what he lost.Until one final act of defiance opened the door to something greater.When Ethan completed a hidden quest, fate granted him a miraculous reward: a second chance.He awakens years in the past, on the eve of a revolution: the launch of Ethereal, the world's first fully immersive VR game and humanity’s obsession. Armed with memories of four years in Ethereal, he’s no longer the helpless pawn who lost everything.This time, Ethan knows every secret, every hidden quest, every exploit to climb back to the top. But when he steps into the game, the system unveils a shocking twist: a divine bloodline, legendary abilities, and a class no one believed could dominate.Ethan vows to rise once more, but this time, he knows where the paths of glory begin, where betrayal lurks, and where to find legendary treasures that will crown him king in this brutal new world.The stakes are higher than ever. Factions are forming, alliances are shattering, and the clock ticks toward an event that will rewrite reality itself.The weak will perish, and the strong will thrive.They betrayed him once.They won’t live to do it again.

After suffering from a heat stroke while working under the scorching heat of summer, Lu Zhou, a hardworking but poor university student, somehow becomes the owner of an advanced technological system. With the cheat given by the system, his university life changes overnight.

A Master’s degree? Easy.

PhD? Not a problem.

From a nobody, he quickly becomes a huge celebrity in the world of science. With the missions given by the system, he is on his way to winning a Nobel Prize.

“System, can points be exchanged for money?”

“No.”

“F**k, what use are you then!?”

“This system will make you the ultimate scholar, the kind that lords over all of humanity. What use will money be to you?”

- Description from Novelupdates

The notorious firearms crime lord Chen Zhang An a.k.a Old Fox was placed under house arrest by the very successor he groomed.