I, The Female Protagonist With Superpower, Am Super Fierce - Chapter 3189 - you are my favorite

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.

Three-and-a-half-year-old little girl, also known as Ann, lived a life of scarcity and hardship in an orphanage, where even a single steamed bun could lead to beatings and scoldings from the headmaster.Just before Ann fainted from hunger, a mysterious and domineering daddy from a wealthy family descends from the heavens and took her home.President Qin sneered, “I will make them pay a thousandfold for the suffering my daughter endured.”With six doting and influential elder brothers:The Youngest Brother was responsible for beating people up.The Second Brother was responsible for saving lives.The Third Brother was responsible for fighting lawsuits.The Fourth Brother was responsible for capturing people.The Fifth Brother was responsible for providing financial support.And the Eldest Brother was responsible for salvation.With comprehensive and attentive service, are you afraid or not?The major prestigious families competed to stand up for the little prodigy: To bully Ann is to challenge the entire Qin family!Even the pet, a wise and future-seeing white goose, refused to be outdone: Protect Ann!Ann stood with hands on hips and said, “Stop arguing, line up properly, and listen to me.”The Qin family: Understood!

Xi Nan had loved Cheng Yi for ten years.After graduating from college, she confessed her feelings but faced rejection.Eventually, one went abroad and the other ventured into the entertainment industry.Five years later, Xi Nan became a highly sought-after celebrity in the entertainment circle, and Cheng Yi rose to be the youngest head of the Cheng family, known as a business genius by the media.An arranged marriage contract reconnected them once again.Rumors had always spoken of Cheng Yi, the CEO of Yi Feng Group, as decisive and aloof, a unique figure with almost no romantic scandals, yet he attracted countless admirers.However, the latest news drove all the high-society ladies in Jing City mad.Reports claimed that Cheng Yi was secretly married and had even commissioned a famous international jewelry designer for a priceless engagement ring.One day, as Xi Nan was watching television at home, Cheng Yi called her, asking her to retrieve a document from his study.Finding the document on the desk was easy for Xi Nan.But at the same moment, she discovered Cheng Yi’s secret—a small black box inside a cabinet.It contained a diamond ring, easily seven to eight carats, fittingly described as a 'pigeon's egg'.Xi Nan tried the ring on, and it fit perfectly.In that instant, something deep within seemed to blossom, her eyes swirling with a layer of subtle surprise and bewilderment.

Hiding in the Cold Palace and eventually becoming a Boss of Sorts. Li Mu was transported to a fantastical world and became a measly eunuch of the State of Xia. Despite having initially thought that his life would be a miserable one, he had unexpectedly acquired a check-in system.