MTL - Mr. Zhan’s Little Demon is All Grown up - Chapter 2649 so close!

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.

SSR-ranked killer Mu Hui died in an explosion, only waking up to find herself transmigrated into the body of a vicious female supporting character in a book.

Lin Xiao, who just won China’s first World trophy, got in an accident and was reborn five years later.

With the rapid development of the eSports industry, the career as professional player bloomed, the Club’s Gods circle/Professional Commentators circle/Popular MCs circle, the old friends from back then were all over the place.

The return of a King, aiming for the League, going from an unknown rookie to once again rising to the top.

Reporter: Regarding the rumours between you and Captain You, is there anything you want to say?
Lin Xiao: With all due respect, with my ability there is no need for un-spoken-rules!
Reporter: Captain You, is there anything you want to add?
You Jing: The rumours are true, back then he was vying for my love.
Lin Xiao: …how many times do I need to say it, that person wasn’t me!

- Description from Novelupdates

Pei Xian, who looks like the green tea and white moonlight of Big Boss in the book, was forced by Zhou the First Gongzi to kill his child and send to the villain Big Boss as a substitute lover. Pei Xian would rather die than submit that he jumped from the building to his death.

When Shanghai’s Great White Shark Si Yang was only 28 years old, he died of illness and transmigrated as the cowardly and timid cannon fodder Pei Xian, airboned in confusion on the scene of the jump off.

Big Boss Gu Han: Come down, I want you and your baby.

Pei Xian▼_▼: 30 million free shipping, no check.

Zhou Kai:

In Gu Han’s book, the villain Big Boss was beaten by half of the book by the male protagonist’s “wisdom reduction aura” and eventually the Big Boss’s company went bankrupt and he became depressed. Now he is reborn with a system called “concern and care for villain’s IQ”, and Pei Xian is the system’s battery. Gu Han needs him to be around all the time to charge before using the system.

System task: Hold Xianxian’s little hand. System energy + 1

System task: Praise Xianxian, praise Xianxian beautiful. System energy + 1

System task: Please Xianxian and spend money on Xianxian. System energy + 2

System task: Make Xianxian bashful and coquettishly says hate. System energy + 2

System task: Make Xianxian satisfied!!! System energy + 10

Gu Han: Who am I? Where am I? What am I doing?

Green tea/white moonlight comes to the door: scram off substitute, this Immortal man has thought through to come back!

Pei Xian takes out a calculator▼_▼: Hello, please wait a moment. There are nine supercars, two listed companies and three mansions worth million all of which have been transferred to my name. Only the bankrupt goods belongs to you.

Gu Han picks up the scheming boy, turns around mercilessly and goes upstairs….

The sound of the bed collapsing came from upstairs.

- Description from Novelupdates