Lust System: Harem In Two Different Timelines - Chapter 130: Seiko Shizuka

After suffering so much on earth, Liam died with his heart filled with hatred for heaven and humans.....

At the great void of reincarnation, he disobeyed a god and entered a different reincarnation portal....

He was reborn in a new world, possessing immersive bloodlines abilities....

With this he have finally started his journey of going against the heavens..

[Love After Marriage]In order to avoid an arranged marriage, Shen Yin, the young miss of a prominent household, jumped into the water in protest. When she opened her eyes again, she found that the world had become fantastical. Not only was she naked, but she was also lying in a large white tub. Just as she thought she was dead, she was told that she had a child and a husband. She tried to regain her clarity.

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.

Yun Xiangxiang was a well-regarded celebrity in her previous life.