After Rebirth, I Married the Great Demon King - Chapter 477: Can’t Bear to Leave

Transmigrated to a wizarding world.'But... what about the promise of wizards pursuing truth?''Why is it just a bunch of greedy people who seek power!'...Passing guests, please come in and take a look; if it's not the right fit, then feel free to leave.

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.

【Transmigration + Famine Escape + Farming + Infrastructure】Professional white-collar worker Xiao Cheng accidentally dies while saving a drowning child and transmigrates to a small mountain village, believing she's in a farming story. However, the system says, “Host, we need to survive by completing tasks first.”What? Fighting tigers? No, no, isn't that Wu Song's thing? I can't do that!What do you mean we have to migrate? I've just gotten my footing and you want me to move?Oh! Foreign enemies are invading? Then pack up quickly and run.What about becoming a City Lord? Too troublesome. I just want to be a slacker.Being a concubine? Get lost, you average guy, dreaming in broad daylight!Something or other every single day! I'm done, I want to retire and enjoy a leisurely life with my family!----- However, the system doesn't allow it and keeps popping up to demand attention, “Host, hurry, there's another task. If you don't do it, you'll be erased.”“You lousy system, I want to apply for retirement.”System, “Host, your application has been processed and rejected.”It's infuriating, how is this never-ending? I'm going to complain to Ah Mo......

He is an extremely wealthy empire president who is obsessed with his wife and loves to pamper her.

One day, the bodyguard came to report: “Master, the young lady has gone after her fiancé!”

“Master, the young lady confessed her love live worldwide!”

“Switch the photo and name to mine!”

“Master, madam, go to the hospital to have the child aborted!”

The handsome and noble man was furious, “Get the young lady back to me so that I can serve her well! Stop, I will catch you myself!” [After Marriage]

Su Fu glared at her extremely possessive husband: “Get a divorce, we can’t survive this life!” Shangguan Ling smiled coldly: “It’s just that, whoever you don’t leave is your grandson! I will give you the property and the little buns, and I will give you the property.” Here you go! Wherever you go I will go too!” (Nuan Chong)

- Description from novelbuddy