Longevity Strange Immortal - Chapter 126 - 127: Divination on the 10th Day, No Life Shall Be Granted

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.

Suddenly finding herself in a rural setting, Lin Caisang became the village's renowned 'Star of Wealth and Honor'. Surrounded by unique relatives, they treated her as if she were a rare panda—held preciously in their palms for fear she would fall and gently kept in their mouths lest she dissolved.Meet the exceptional relatives:The Powerhouse Father, who declared, “You want Sangsang to get married? You'll have to get past me first.”The Stingy Mother, questioning, “What does she need a husband for? She can have all the fine food and a carefree life with me!”The Sly Grandfather, suggesting, “Girls shouldn’t have to do the dirty, tiring work. Quick, call over your brother!”The Majestic Grandmother, fiercely proclaiming, “Who dares to bully Sangsang? Let them face a fight to the death with me!”The Protective Brother, assuring, “Little sister, all the good food is for you. I am not hungry!”Holding her flabby flesh, Lin Caisang wept without tears: “Let me go! I need to lose weight!” Meanwhile, the strikingly handsome, icy man next door not only protected and spoiled her in secret but also had a not-so-simple identity.....

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