Real Empress from a Noble Family - Chapter 472 - Trifles Before the Lunar New Year

Some crowns are forged in blood. Others are drowned beneath it.In a city strangled by smoke and silence, where children are shackled to machines and shadows rule behind gilded masks, Keiran is just another forgotten soul—until the mark appears.Buried beneath the factory’s foundations lies a world long erased from history. Ancient oaths whisper through stone and water, and something older than memory begins to stir. As Keiran is drawn deeper into the abyss, he uncovers a legacy not meant for mortal hands—a crown shattered in defiance, a flood sealed by sacrifice, and a power that demands a price.Hunted by tyrants, haunted by echoes, and bound to secrets he never asked for, Keiran must choose: drown in the tide of what came before, or rise against the current and reclaim what the world was forced to forget.But the deeper he goes, the more the truth unravels…And beneath it all, something still breathes.

In the 21st century, she was the strongest bounty hunter who possessed supernatural powers and was proficient in brewing all types of potions. However, she becomes the first talentless child of a cultivating family when she transmigrates.

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.

Ever since she transmigrated, she was blessed with an inbuilt anti-poison detector.

Beep beep – What? Her father’s concubine was evil and her half-sister was vicious?
Beep beep – Ah! She was in an arranged marriage and her husband did not love her?

Who cared? She could kill those evil creatures instantly with her high intelligence.

Her unparalleled beauty attracted countless suitors and her popularity topped the charts. No one was immune, even the emperors and princes were all captivated by her…

- Description from Novelupdates