The Mage of Eternity - Chapter 823 - : The Scene Before the Destruction of the Divine Court

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.

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

It had been two years since their marriage. However, every time he had s*x with her, he always did it from backwards.

She was more than angry. “Sheng Youting! Why do you avoid my face every time when you had me? Is it because that you are afraid to see it’s me rather than my sister that you get laid?!”

“Are you asking me to look at your face when I’m in you? OK, as long as you can bear!”

He was like a beast and all she could do was to accept what he gave…

Yu Lan had loved Sheng Youting for 11 years despite no response from him. Inferiority became part of her when she was with Sheng Youting. However, when she found it was so hard to continue her unrequited love and finally decided to exclude him from her world, her heart ached extremely and it nearly cost her life. It turned out that her love had become a habit and if it was stopped, she won’t be a whole man.

- Description from Novelupdates

A good-for-nothing man married a beautiful girl but was kicked off the bed on the wedding night. Furiously, he wrote a bill of divorce and ran away.
He was schemed a car accident in which he nearly lost his life. However, it turned out to be a blessing. He swallowed the soul that passed through the outer world, thus obtained superb medical skills and martial arts.
Later on, with the silver needles and invincible martial arts, he embarked on the road of counterattacks and was committed to his great dreams.

- Description from Novelupdates