Floating Immortal Order - Chapter 7: Grade

Ye Sichen, a well-known singer with perfect appearance, is also a father of two kids. In the outside world, he is a charming star who cares about his fans and people in need. At his home, he is a lovely father and also a considerate master. A man with his fortune and statue, what bothers him so much?

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 s*ave boy, Ram, who assassinated an enemy commander to end a war.Jedrik, the great chieftain of the North.Demion, the prince of the South.Charlon, the duke’s daughter.The blood oath they forged plunges a seemingly ended war back into chaos.

They say the greatest blessing is marrying the idol you always dreamed of.

But Qiao Lian knows that reality is different…

The Internet claims that Best Actor Shen Liangchuan is a male god who is unaffected by any sexual drive, but Qiao Lian vehemently disagrees. It’s a lie!

After finally carrying out the contract, Qiao Lian burst out, “I want a divorce! I don’t want such a life!”

- Description from Novelupdates