MTL - Song in the Peach Blossoms - Chapter 1 The story is like this

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.

Thirty-six [sequences] rule the world, and the creatures who hold the [sequences] can move mountains, cut rivers, cover the sun with one eye, and enter dreams for thousands of years.

There are heroic wine immortals who master the [Wine Sequence] and walk freely, there are court princes who understand the [Law Sequence] to formulate laws, there are [Tao Sequence] Taoist priests in the mountains, there are [Gu Sequence] wild Gu masters, there are [Gu Sequence] Love Sequence] the stunner and beauty.

Waking up from a dream, for Chen Yuyan, the rivers and lakes are no longer the rivers and lakes in the game “Strange Rivers and Lakes”, but the real world that is vividly presented before him.

In order to survive, in order to get rid of the gaze of the “fairy god”, Chen Yuyan had to step into the rivers and lakes, facing conspiracy, swords, swords and shadows, and ulterior motives.

- Description from novelbuddy

As Shin Youngwoo has had an unfortunate life and is now stuck carrying bricks on construction sites. He even had to do labor in the VR game, Satisfy!

What happens when, in the midst of struggling to keep up with life, you suddenly discover that you were a princess in a past life? Now, you're just a waitress with a drunken mother and a pile of bills to pay. But deep down, you know one thing: you’ll find the stupid jerk responsible for ending your royal life, no matter what it takes.Alexia POV:Then there are the spoiled, narcissistic rich jerks who think their daddy's car gives them a free pass to treat women like objects. Not today, Satan. These guys are like walking perfume ads with egos bigger than their bank accounts. I swear, they should just marry themselves—they're clearly their own type.When one of those jerks lands at my table, I can smell the entitlement from a mile away. I don't even wait for the inevitable sleazy pickup line or the “accidental” brush of their hand against mine. Nope. I pawn them off on one of the other waiters faster than you can say “unpaid rent.”