Cold-blooded Undercover Master - Volume 1 Chapter 1238 Ninth Grade Alchemist

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.

Before the rebirth, Gu Qingyao wanted to marry him but did not dare to marry. After the rebirth, Gu Qingyao, with the space materials in hand, all day planning to marry him with a huge dowry.

The Mayan ceremonial dagger had an inscription in the ancient language that read: “Offer thy heart”. It's obviously an instruction left by the past inhabitants of this forgotten place, but who would be stupid enough to stab himself in the heart with a rusty old knife found inside a tombstone?After activating my battery pack the dagger shimmers brightly in a cyan light, the creatures are coming, I can hear their steps.

I want an S-Rank skill too! I want it so badly, I could die for it!