The Devil's Harem - Chapter 144

In one moment, he was walking down the street with his little sister—In the next, he had traveled to the world of One Piece, carrying a system that could extract, record, and fuse genes to cultivate powerful lifeforms.Thus began a leisurely and carefree life in the most chaotic world imaginable.When bored, he’d snatch a bit of heavenly tribute meant for the Celestial Dragons.When curious, he’d raise a few cute kittens and bunnies just for fun.When restless, he’d wander through the territories of the most fearsome powers in the New World.Life is beautiful—so why bother taking anything seriously?

The entire world knows that the heir of the Jiang family is smitten with Miss Lu, but Miss Lu doesn't see it that way.Lu Jing thinks Jiang Ye has too many unbearable traits and doesn't want to indulge him.One day,the heir runs to the Lu residence.“Lu Jing, when will you finally grant me a formal status?”“Lu Jing, don't accept their things, whatever you want I will give you!”“Lu Jing, you are mine, and you can only ever belong to me in this lifetime!”Lu Jing: “Scram~ Stop disturbing my sleep!”(1v1, reunion after separation, pursuing wife to the crematorium.)

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.

Reborn into another life as a village boy,Lu Changsheng unexpectedly discovers that he awakens a very low-profile longevity system.The longer he lived, the better his cultivation talent would become!