Immortality Cultivation: I Farm in the System Space - Chapter 262 - 246: The Demonic Path Demon Cultivator Strikes Again

Tian Man Continent is a world of martial arts. A young boy named “Su Yi” led countless yao (monsters or demons) and overrode countless families who had thousands of years of history. He rose abruptly in the world as the brightest star in the sky. He married beauties and walked towards the peak of of the world, and finally ascended onto the thrones of the ancient gods!

- Description from novelupdates

After his wife suddenly rose to fame on a variety show and asked for a divorce, Chen Yu left with his daughter with nothing but the clothes on their backs.At the moment he received the divorce certificate,“Congratulations, Host, for unlocking the Divorce Achievement and activating the Perfect Counterattack Life System.”Chen Yu made his way from catering to entertainment, medicine, and the financial industry before venturing into the field of technology.When his ex-wife Fang Yuan came to see their daughter, intending to mock Chen Yu, she was stunned by the scene before her!All those entertainment industry big shots she had tried so hard to cozy up to were now revolving around Chen Yu.Regretful, Fang Yuan wanted to reconcile with Chen Yu, but then she discovered their daughter's teacher Tong Ya...

From a caste based high school, bottom-tier Naomi Masatsugu is caught up in a summon of his class to a different world. However, as soon as they arrived the king said, “This guy is unnecessary because he only has clumsy skills ” and it is concluded that he is to be forced to administer the orphanage, which no one wants to do. Unfortunately for the orphanage his skills were cheat skills that cause the girls to cling to him.

In order to “defend” the girls that depend on him, he must operate the orphanage while overcoming the powerful people, authorities, and former classmates that surround him.

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.