Rebirth: The Fake Young Lady Is A Real Young Lady - Chapter 989 - : Cousin

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.

Here martial arts are no longer intangible legends. They have been passed on from generation to generation and from century to century. After the confrontation with science and technology, they have completely integrated into modern society and all kinds of martial arts competitions are taking place across the country as superiority among scholars are hard to reach a consensus but not as difficult among martial artists!

Lou Cheng has found an unknown cultivation item that fuse with him and help him for the first part of martial arts, the meditation.

Towards his original dream and the glory in his heart, he will advances step by step, becoming the warrior of this modern city and the hero of the era!

- Description from Novelupdates

This year, Ji Jingqiu is 16 years old.To survive, he envisions the Fire House Buddha Prison, plants a bodhi treasure tree, and embarks on the path of martial arts.Many years later,A brilliant light arises, illuminating endless darkness.A towering ancient tree, with emerald green leaves and a canopy like a pavilion, rises with glass-like clarity into the sky, supporting a divine realm of pure land, spanning countless ages, illuminating the three realms and ten directions.On this day,All martial artists under heaven look up to it, like mayflies seeing the blue sky.......“Within there is a bodhi tree, which I planted when I set foot in martial arts, and now it has grown to provide a canopy.”“I see everything in the world, and nothing is like me.”“That year, I scoured history books, this history without era, I looked horizontally and vertically, and saw those characters – ‘The world’s storms come from us.’”...— Excerpt from the autobiography of Ji Jingqiu, the proud sun of the martial arts world of today.