The Extra is a Genius!? - Chapter 34 – Aftermath (Part 2)

Liu Qing resigned.

He wrote on the reasons for his resignation:

“I’m going to inherit hundreds of millions of properties.”

- Description from novelbuddy

Yun is a novice MMO player who equipped only unpopular skills labelled as garbage. However, soon after the official launch of the game, the NPC stopped to sell Recovery Potion. Everyone finally started to notice the importance of Support Magic and Items. And that spells trouble for Yun as well as all the support-based players. They received orders for recovery potion from endless flood of players en masse, some more aggressive players even go as far as forcing the support players to be their personal craftsman. In order to prevent this from going out of hands, all the support players grouped together to form a community to keep things in order.

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.

One day, a villainess came to the orphanage.“I absolutely can’t stand children!”“How can someone my age have a child? It doesn’t make sense!”“What’s so great about these little creatures that tire you out all day long…”Setting aside her dislike for children…Somehow, after she arrived, the children started gaining weight.“It’s all because of the contract, you know?”That’s what she says.While personally feeding them sweets she made herself.