The Hero of Hypnosis - Chapter 3: Hearthwood

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.

【Your descendants in the Immortal Cultivation World have offered a plate of snacks】【Incense Fire Value +10】【Would you like to reward your descendants?】Yang Genshuo was surprised to discover that offerings in the Immortal Cultivation Family game could actually appear in the modern world, and that modern items could also be bestowed upon descendants in the game.Years later, peculiar rumors about the Yang Family spread throughout the Immortal Cultivation World.“To break through from the Fetal Breathing Stage to the Qi Refinement Realm, one needs to refine a strand of heavenly and earth's spiritual energy. I've heard of Red Flame True Qi, Xuan Water True Qi, and Green Wood Spirit Energy, but Yang Dao-friend, this... Liquefied Natural Gas, what kind of spiritual energy is it? How is it condensed?”“I've heard that the Yang Family's Spiritual Plant Technique is incredibly sophisticated, with each mu of Spirit Rice yielding twice as much as top-tier Spirit Plant Families, all thanks to a strange secret technique the family disciples cultivate called 'hybridization'.”“The Yang Family’s art of elixirs is unrivaled in the world, with new elixirs constantly being created. It is rumored that a spirit of the elixir named 'Artificial Intelligence' tirelessly deduces elixir recipes day and night...”“Nowadays, the Thunder Cultivators of the Yang Family are exceptionally strong, all thanks to the Yang Family's effort in creating a top-tier Thunder Gathering Array. Thunder Cultivators who enter this array can increase their cultivation speed multiple times. It is said that the array eye is known as—the power station.“As the Yang Immortal Cultivation Family grew stronger, Yang Genshuo actually became the only Immortal in the modern world by consuming offerings!Years later, facing an endless stream of people ascending the mountain to seek the Dao, Yang Genshuo calmly said,”There are no immortals in this world; you must believe in science!“Then he soared away on his flying sword.

[Shuangqiang, sweet pet, 1v1]

A very distinguished person has come to the west city.

The mysterious man Rong Wuye is ascetic and dignified, ruthless and crazy, unparalleled in power and wealth, but he is also a well-known and unfeminine flower in the business world.

“Follow Fifth Master to keep you safe.”

“That mountain, and the three mountains connected to it, are all our private domain.”

“I don’t even intend to give my name to Lao Tzu? I’m sorry!”

He pushed her against the corner, “Little thing is misbehaving, how should I be punished?”

…

Nanhuang was reborn and found that she had become Ye Nanhuang, a woman whose marriage was not going well.

A cold divorce agreement was thrown in front of her. She took the agreement, signed it quickly, and left.

Stupid scumbag, sister don’t want it!

“Ye Nanhuang is a divorced woman.”

“Ye Nanhuang knows nothing but painting.”

“Have you heard? She is barren.”

The powerful and overlord of the imperial city, Rong Wuye, came all the way to the west city, and put his arms around her slender waist.

“Little thing, marry me, huh?”

- Description from novelbuddy

As the leader of bandits, Yan Jinyi has been a bully for twenty years, and she ended up causing her own death. The next thing she knows, she wakes up and finds that she has become the Second Young Mistress of the Huo Family. Wielding her knife, Yan Jinyi starts to throw her weight around conceitedly again. Young Master Huo says, “If I’m still single, I’ll probably marry my sister-in-law.” Third Young Master Huo says, “If I could turn back time, I would have vied with my brother to marry my second sister-in-law. Miss Huo says, “If I were a man, my second sister-in-law would be my woman!” A CEO says, “I thought I was roguish enough, but I didn’t expect Yan Jinyi to be more of a hooligan than I am!” The Best Actor says, “Huo Xishen, why are you still not divorced?” Second Young Master Huo points to Yan Jinyi and says, “She is mine.” Rumor has it that the second daughter-in-law of the Huo Family can beat a home wrecker up and is especially good at making money. Countless bigwigs are lining up to make a cuckold of Huo Xishen.