Love Rival Romance System - Chapter 5 - Mutual glare

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.

“You called me lazy, good. Watch me turn sloth into gold.”—Rino.***Rino used to be a boy who was betrayed by someone he trusted to be his intern, and left to die all because he believed in digital money. At just 18, his entire world laid into shambles when his intern retrieved the loan he borrowed, the bank seized all he had left with him, and worse, his father disowned him.That was when he died out.But fate had other plans.He wakes up in the body of Rino Carter, the “useless” son of a global billionaire who also believes in online wealth, but is termed lazy by everyone around him. Except this time, Rino has something powerful by his side...He awakened “The Throne of Gold System”.Not only did he awaken this system, Rino returned as another being of the same identity in a different timeline, and this time, he’s building an empire no one can take from him.He’ll conquer the world of money, crush his enemies and win hearts, with the system by his side.***“You see, money is power. And I? I have money.”—Rino Carter.

Mediocrity is the normal state of most people, and some of them can’t even reach the normal state~ A young man from a small town, ugly and inferior, disliked by relatives and friends, mediocre grades…

All these changes started with a beam of light going to the university train, and the boy was bound to the high-quality male god system.

The days are getting more and more hopeful, and the system is really fragrant:

As long as you learn, you can modify your own bugs;

As long as you do good deeds, you can get corresponding banknote rewards;

As long as you are praised, you can get relevant talent blessings;

…

This, it’s hard not to love, okay!

- Description from novelbuddy

Jiang Su transmigrated.

He transmigrated into a BL harem novel as the novel’s main character, jianghu’s number one beauty, who bewitches the masses with just his face, then is subjected to shame, humiliation, and infamy at the end.

To prevent this from happening, Jiang Su diligently practiced his swordsmanship. But then he suddenly realized…If he is still single when the original storyline ends, he will be forced to return to his original world.

Jiang Su: ……

- Description from Novelupdates