MTL - Reborn: Revenge of the Concubine’s Daughter - Chapter 36 Your father is still waiting for you

Before his death, he was the only sword cultivator in the whole world, who dedicated his entire life to the path of sword immortality.

When he opened his eyes again, the world had completely changed. He began to cultivate the path of sword immortality again, slaying the heavenly way, shattering the universe with his will, and achieving the realm of sword immortality!

- Description from Novelupdates

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.

In the age of fragmented reading, the warm love life with healing power is well received by readers. Gu Weiyi, is warm, good at study, and handsome. He is tender, caring, good at cooking and can even warm the bed. It is the love life between Gu Weiyi and Momo. Gu tries all means to win Momo’s love, while Momo is slow in love.

- Description from Novelupdates

Jian Ci is the light. An S-class Esper, his powers ripple with the warmth of a thousand suns, his smile a blinding beacon that draws humanity, and hope, to him like moths to a flame. He is the Sun, a magnetic force of nature, utterly unaware of the abyss that gazes back.Yu Xi is the dark. A shadow with skin, a man who walks through life with a silent, consuming emptiness, broken only by a singular, scorching singularity... Jian Ci.He is the Abyss, a dark constellation orbiting a single star, and his existence is now defined by the answer to one terrifying question.How far are you willing to go for him?Yu Xi’s response, spoken as clearly as a death sentence.“To hell and back.”This is the story of an impossible equation: Light + Darkness = ?It is a love that warps physics and morality, a descent into an obsession so profound it threatens to rip the very fabric of their world.Yu Xi knows their combination is impossible, a contradiction that should result in utter annihilation. Yet, with a quiet, terrifying devotion, he is prepared to burn the world, his own soul included, if it means securing his star.