The Young Matriarch - Chapter 446 - The Ancestor is so Ruthless and Fierce

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.

In the third year of the Republic of China, Yao Zhi was 14 years old and the jewel of the governor’s office.

At that time, the young man next to the marshal’s mansion was still physically disabled and had his feet deep in the mud. Yao Zhi stretched out her hand and tried to help him, but the boy, who looked fierce, shut his eyes and was heartless. Yao Zhi has been the white moonlight of all young men in Beijing since childhood. Her crescent eyes were curved, and her beauty was incomparable.

Shen Xu regarded her as a god in his heart and never dared to put her in the bottom of his heart.

He looked up at the gods on a bright moonlit night, never thinking that one day she would take the initiative and rush into his chest. Yao Zhi, who became the pinnacle of his two lives, grabbed his clothes and said quietly.

“Shen Xu, if you ignore me again, I’ll kiss someone else.” Shen Xu couldn’t suppress his youthful emotions. He held the god’s waist tightly. He had no choice but to beg her repeatedly. “Zhizhi… “

“Don’t leave me,” she said, knowing that he was young and humble and that he had feelings as deep as the sea for her.

She wouldn’t leave. She would be the apex of the young man’s heart and stay together with him.

- Description from Novelupdates

I turned my assassin into my maid with the power of money! Money is all-powerful!

It was a world full of swords and magic; Lawrend was the son of the wealthiest merchant in town. Since the age of 7, he had been having dreams. A dream about a past life in a modern civilization where monsters are nonexistent, and humans dominate the world. Lawrend saw Iron birds, Magical bricks that display moving paintings, Thunder wielding, and many more.

There was a scene in one of the dreams that made Lawrend’s heart beat fast. A row of a dozen maids bowing in front of him. Each dressed in a french maid outfit.

Something awakened inside Lawrend when he had that dream. A fervent desire to have his very own Maid Harem!

Earth Online – a virtual MMORPG that takes place in the future year of 2190 – a game that everyone will bet their futures on. Set in a map that is ten times the size of real-world Earth, players battle for supremacy in the first game to feature personal adventure, territory construction, and grand warfare. For every death you experience in the game, your level would drop back to zero. Ouyang Shuo, an above average player, suffered the ultimate betrayal. For merely a piece of equipment, his sworn brother betrayed and backstabbed him. This time, after he reincarnated in the game, Ouyang Shuo swore to exact vengeance.