Destroying My Own World - Chapter 91 Invincible.

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.

Tsinghua University's top law student, Ji Xizhi, accidentally enters a book and becomes the naive secondary character in an entertainment story. Bullied online and pushed to the brink of quitting the entertainment circle, she fights back.On the day of the court hearing, Ji Xizhi goes to court alone and defends herself, completely outwitting the opposing lawyer and winning the case.Tsinghua Law School Professor Jiang Qianli tweets in her support: “Congratulations to my student on winning her first case.”Law School students chime in: “Junior, the Law School is waiting for you!”Her agency, which had been making threats, is left stunned: “????”Her fans are in disbelief: “?!!!! The idol I just started following suddenly got into Tsinghua?”[Entertainment Circle + Super Scholar + Various Variety Shows + Sweet and Empowering + Strong Female Lead]

The Queen of the elves wants to bear his child, the vatican’s saintess is his maid and the empire’s princess wants to elope with him.

But his only concern was his delusion of taking down the creator of the world!

- Description from Novelupdates

A rookie clerk asked his senior curiously: I heard our President is already married?