MTL - Necromancer and Super Cemetery - Chapter 810 816? was found

Su An was thrown into a world of quick transmigration by his suitor, who attempts to approach him with a different identity.

Hidden dangers can not be prevented, but fortunately, with sweet words and beauty, Su An has won the love of the big bosses from each world.

An indifferent painter suffering from mental illness, a flirtatious bandit young master from a wealthy family, a demon monk with powerful martial arts skills…

To Su An’s surprise: Every big boss is poking my appetite!

The big bosses who got hooked up: …

They all gave a meaningful smile.

- 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.

[Congratulations, you have earned +9 coins. You have repaid 999,999,999 / 1,000,000,000 Coins. You need 1 more coin to repay your debt.]“You’ve got to be kidding me.”______After living a hundred lives, Lucian finally managed to repay his debt to the system. World after world, he fought, bled, and struggled—all for the freedom he had foolishly given up the day he begged the system to save his life.At last, he had done it. 999,999,990 coins. Just one more mission, one last world, and he would finally be free...Or so he thought.But this was no joke. The system had screwed him over one final time.Still, there was hope. With only a single coin left to repay, the system could no longer play its tricks. Freedom was just within his grasp—if he could survive this last world.All Lucian had to do was reach the end. Simple, right?Except this time, the world itself seemed determined to destroy him.