My wife name is Erina Nakiri - Chapter 165 - 114: I Love You The Most

In a hilarious and sweet xianxia romance set in Ancient China, Lu Zhao Yao went through life living ostentatiously in every way possible. She lived her entire demon life in a loud and brazen manner, reigning over legions of demons, and yet——just before she was about to retrieve the sword of the ancient demon king and rightfully claim her spot on the throne——she died.

In the most quiet and unobtrusive manner possible. How? By accident.

Mo Qing, one of her lowest ranking lackeys at that point in time, had killed her after he retrieved the demon sword and unintentionally unleashed the sword’s demonic aura onto the heavily injured Lu Zhao Yao.

Her quiet and untimely death, coupled with her firm belief that Mo Qing had sneakily betrayed her by lying in the shadows and waiting to strike the final blow and reap all the rewards, nurtured a heavy grievance within her. Lu Zhao Yao refused to head to the underworld and reincarnate, hanging around in the human world in her spirit form.

Lady Luck, however, had not completely abandoned her.

One fine day, a female disciple of the Immortal Sect (Zhi Yan) fought with her childhood friend and banged her head onto Lu Zhao Yao’s grave. To Lu Zhao Yao’s utmost delight, she was able to possess Zhi Yan’s body for short periods of time after this.

Thus began her journey to avenge her very own death by destroying Mo Qing——and, in the process, resume her rightful place as the King over all demon sects!

- Description from Novelupdates

The world is big, but I am the only one who is orthodox.Sweeping the world's immortal sects with the power of the Celestial Dynasty.A strong man who practiced the 'Way of the Emperor' came to a world full of immortal sects, and a secular dynasty that was despised by the practitioners gradually came to be on an equal footing with all the top immortal sects.The law of the dynasty is that everything in the world is the king's land, and the shores of the land are the king's ministers! There is only one orthodoxy in the world, and all immortal sects are illegal organizations!

The mighty heavens exist, ruling over all things. Those favored by its will are granted power and fortune, while those who dared to oppose it perished, leaving none behind. This is the tale of a man who once defied the heavens, underwent multiple reincarnations, and returned once more to the cultivation world. But here’s the twist. This young man remembers nothing of his past lives and is simply a teenager from Earth. How will he who has no knowledge of cultivation and experience in fighting, survive this grim world while being an inner disciple of a lower realm force—or so Xiao chen, the teenager thought till he heard a systematic sound in his mind. [Ding! Host has awakened the heaven’s destined villain system!]

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.