After Her Engagement Annulled, the Weak Rich Daughter Becomes a Big Shot! - Chapter 275 - : Beat Him at His Own Game

After annihilating Han, Zhao and Wei empires in succession, the dynasty of Qin is ushering in an unprecedented flourishing age with powerful cultivators emerging endlessly. People take pride in being part of the Qin dynasty. However, Ding Ning, a young lad of humble origin in Changling, Qin, is determined to subvert this dynasty and kill the emperor who breaks in the Eighth Realm.

- Description from Novelupdates

To correct the mistakes of his past, a young man is forced to narrow the space between science and witchcraft, as he ventures on a quest to save his world from complete destruction.

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.

“I'm your husband” suddenly a man claims to be my husband.How did it happen?Before my coma , The man I loved betrayed me and choose my step-sister, xie huelin . I was accused of abusing drugs by xie huelin and My birth parents kicked me out of the family.My foster mother was the only person who believes in me, But on the day I went back to my foster mother house, the house was burned and she fell into coma.The one who caused it was my step-sister, When I went to the hospital to meet my mother, I met an accident, that was also staged by her!I fell into coma and after a year I woke up, I met a handsome and he's known to be cold-hearted, ruthless and expressionless man who was known as the Emperor of the city. The CEO of Li cooperation , Li jun WeiAnd He claims to be my husband?!