Reborn As the School Hunk's Dearest Daughter - Chapter 399 - Third Uncle Apologizes 8

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.

*NonRape-General langauge*Liora’s life takes an unexpected and cruel turn when she’s sent to the royal court as a concubine for the disgraced Prince Lucien, a man whose past is shadowed by betrayal and loss. Stripped of his royal title, Lucien has long distanced himself from love and loyalty, existing in a cold, indifferent world.Thrown into this world of palace internal battles, power struggles, and betrayal, Liora must face not only Lucien’s frosty demeanor but also the dangerous secrets that lurk within the court. Every move she makes is watched, every word is questioned. Yet, despite his distant nature, she can’t shake the feeling that beneath the hardened prince lies a man struggling with the ghosts of his past.As Liora tries to find her place in this hostile environment, she faces a constant dilemma: Can she warm the prince’s cold heart and heal his wounds, or will she fall victim to the very same forces that tore him apart?'Can she thaw lucien’s frozen heart, or will his haunted past consume them both?'Arranged marriage,Disgraced prince,Court intrigue,Royal concubine,Forbidden love, Political drama, Palace secrets, Unwanted bride, Betrayal. Haunted memories, redemption,Royal court drama, second chances

Song Yu Xi is a tasker.

The system told her that she has a great and glorious task on her shoulders – to save the world!

Song Xu Yi is dedicated to her work, remembering the first rule of the Fast-Travel Code of “no love”, and is dedicated to reforming the world-ending villain and strengthening the power of the protagonist, but she never thought that every world would develop in an unpredictable direction:
The beautiful and charming villainous movie queen hugged Song Xu Yi’s neck and breathed like an orchid: “Kid, why do you always blush when you see me?”

The sickly and delicate villain Omega raised Song Xu Yi’s chin: “My dear Miss Song, how does it feel to have an Alpha become an Omega?”

The cold and beautiful villain student sneered and put the five million check into her school bag: “There is no other way to repay the favor of funding, only the promise of your body.”

The villainous prince disguised as a man slowly tore up the peace proposal: “If you want to negotiate peace, you can let your Grand Princess Song Xu Yi come and make peace…”
System （(艹皿艹 )）: Say no to love and don’t fall in love!!!

Song Xu Yi ((╥_╥)): Sorry!

I blame the villain for being too beautiful, I couldn’t see her tears…

The love story of a hardworking wage earner tasker and a gloomy world-destroying paranoid villain.

- Description from Novelupdates

She is one of the best thieves that the world has seen in the 24th century. However, not even in her wildest dreams had she imagine that she’d be reincarnated as a good-for-nothing orphaned Seventh Miss of the Vermilion Bird Family. She finds herself stuck in a family that mistreats her, as well as an unfamiliar place with no support system.