Reaching the age of thirty, my income randomly doubled - Chapter 991 - 740: Temporary President

Yu Xiaotong’s new novel “Fate's Little Feral Consort”. She was a world-famous miracle doctor in the 21st century. If The King of Hell wanted a person to die at mid-day, she would only let that person die in the evening. After going back in time, her soul was now in the body of a cowardly and incompetent lady of Eternal Peace Marquis’s Residence. On her wedding day, she was sent to the bandits by her fiance. Immediately, she gave the useless man a letter of divorce.

Get lost! Vicious stepmother, hypocritical stepsister, cruel father; all of them wanting her life. She has her own Spirit Beast, she could refine elixir pills; she could even effortlessly master new skills. But why did the handsome and domineering ninth imperial uncle entangle her when she was dealing with those hateful scum? She looked back and sneered, “is our relationship that good?”. The man narrowed his eyes and looked as fierce as a beast, “I’ve already held you and kissed you. Do we have to be in bed together? ”

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.

A lonely soul, which was placed under the care of the Lord Protector’s Manor, ended up having her lover stolen by the family’s eldest daughter and dying tragically the day before her wedding.

Somehow, she was reborn in the family as their 14-year-old first wife’s daughter, Ning Xueyan, with a startlingly familiar face.

Step by step, she will ruthlessly scheme to seek revenge as well as uncover the mystery of her tragic death.

Her former fiancee, the flirty crown prince and the bloodthirsty prince, will now bear witness to a vengeful Ning Xueyan becoming the peerless lady of her generation…

- Description from Novelupdates