MTL - Douluo: Wuhun is Actually Bibi Dong - Chapter 49 Su Mo VS Tang San

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.

Xu Zimei found himself reborn, carrying with him all the heaven-shaking cultivation and memories from his previous life.But something was off about the script. Isn’t reincarnation always the protagonist’s theme? However, I was cast as the villain!This is the story of a villain's step-by-step journey to becoming the Demon King.——————————In an era of great strife, where mystical arts resonated!An elder of the True Martial Holy Sect sat at the Willow Bank River Fishing Platform when suddenly he heard the dragon’s roar. Three thousand carps knocked at the gate of life, transforming into the Measureless Golden Dragon, soaring through the firmament, graceful as a startling swan!There were strongmen who measured the heavens and earth with their strides, monks who sat in meditation in temples for three thousand years, achieving sudden enlightenment—auspicious clouds descended, and all laws of magic cheered in chorus.Blood moons darkened the night, rainbows cut through the daylight.There was a swordsman with a wooden sword on his back who, with a turn and a raise of his hand, shattered thousands of miles of rivers and mountains.In the south of the city, a ragged beggar with a broken willow twig dared to assault the Holy Court of a sect that boasted three emperors.

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates

In the late years of the Daqian era, tyrants roamed freely, war erupted endlessly, and the people could not sustain their lives.After transmigration, Chen Jie finds himself as a drunken gambler with a pair of unfortunate sisters at home.The elder one, Su Yunjin, is his wife, and he also has a five-year-old sister-in-law, Su Yunrui.Their family is so poor they can barely make ends meet.Then suddenly, his beautiful wife comes smiling, bringing him a bowl of hot porridge.“Husband, I was wrong yesterday. Please have some porridge while it's hot.”Seeing the bruises on his wife's face, Chen Jie feels something is amiss.Ding~[Daily Information has been updated][1. Yesterday, you gambled away the last three acres of good land, beat Su Yunjin while drunk, and planned to sell the five-year-old Su Yunrui, to recover your losses.][2. The Su sisters rely on each other. Su Yunrui is Su Yunjin's only hope.][3. Su Yunjin, having lost hope, traded her mother's hairpin three days ago for a pack of arsenic.]...Arsenic!Staring at the hot porridge brought to his lips, Chen Jie looks up at his wife, seeing the faint bruise on her face and her eyes shifting away, avoiding his gaze.“Honey!”“Yes?”“You're not going to kill me, are you?!”