Empress Running Away with the Ball - Chapter 16: Buried three feet deep

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.

Lying on the hospital bed, Yu Bing, who was severely ill to the point she could not open her eyes, could do nothing but wait for death. Because of her frail body, her parents had disliked her since she was born. And because of what happened in the countryside, her elder sister hated her for a lifetime. Her second sister, Yu Yan, who had been sent away as a child, also hated her for some bizarre reason. All kinds of framing and setup were used on her, and they even stole her fiance from her…

As she didn’t get enough love and care since she was young, she regarded Yu Yan’s false kindness to be real and treated her sincerely, only to have the former trample all over her reputation. For the sake of getting a smile from her parents and some false praise, she lived frugally until she almost died. Looking back on her life, Yu Bing felt it was absurd, and endless resentment festered in her heart. She had never done anything to anyone, so why? Why did those relatives and close family members treat her this way? Since they didn’t want her, well, then she wouldn’t treat them like family anymore.

If there was a next life, she didn’t want to be the Yu family’s daughter! “She’s my sister, so how can I not love her? But the dead have to make way for the living. It’s rare that there’s such a happy event in our family. We can’t let her bad luck taint this home!” Familiar words rang in her ears. Yu Bing opened her eyes with difficulty, and found that she had been reborn back to when she was younger! She had been reborn to the eve she had been sent to the countryside. Her family was arguing about who to send to the countryside in response to the call of the country.

Her elder sister had gotten married in a hurry as she didn’t want to be sent to the countryside, and placed all the blame for the misfortune of her marriage on Yu Bing. As Yu Bing wanted to stay away from the Yu family, she took the initiative to sign up and went to the countryside. She completely cut off contact with the Yu family and vowed to change her destiny!

She, a 21st century mercenary queen, had crossed over into a tragically betrayed body of a waste. Waste? She will show them what it means to be a waste! Betrayed? With the Ancient Manual in her hands, she will astonish all the despicable men and cheap women!

Wait! Didn’t everyone say that she was an evil woman which everyone feared? Why is his Third Highness, full of mystery and charisma, so interested in her?

- Description from Novelupdates

By a twist of fate, Tang Su discovered that the aloof male god she once had a crush on lived right across the hall.It had been eight years, and he did not remember her at all, so Tang Su had to tuck away her affections and pretend she didn't know him.Every time they met, she would properly call him “Doctor Lu.”……One day, while Lu Han was taking a nap, Tang Su slipped into his office.The duty nurse shot up in surprise, shouting “Stop” as she followed after Tang Su.By the time the nurse arrived, Tang Su was sitting in the chair, stretching out her leg to hook Lu Han's, coquettishly asking, “Doctor Lu, my leg hurts, could you take a look?”Lu Han stepped back and turned to the nurse, “You go out first, I'll handle this.”The nurse nodded, considerately closing the door behind her while muttering to herself that she didn't know how many women had thrown themselves at Doctor Lu. Each one of them had left crying.After a while, the office door opened.The nurse looked up to see that Tang Su as expected, was limping out with reddened eyes.The nurse smiled knowingly, thinking that Tang Su had overestimated herself.Soon after, Lu Han hurried out of his office.He swept past the nurse, scooped Tang Su up at the waist, and carried her sideways back to the office.As he walked, he whispered to Tang Su, “Didn't I tell you to wait for me a while? Why are you walking around with a sore leg?”……After they got married, Doctor Lu was often away for meetings, surgeries, and paid learning, hardly ever at home, not even answering phone calls, leaving Tang Su practically like a deserted bride.She wrote in her TikTok bio: “Living like a widow.”Then—One stormy night, Doctor Lu came back.Before long, she changed her TikTok bio to: “Please spare me.”