MTL - Urban Tales of Demons and Spirits - Chapter 239 Start of plan

Master martial artists were beings that no one can obstruct. A martial arts expert has been reborn into the body of a genius whose cultivation has been abolished and has been abandoned by a woman. Therefore, he starts cultivating the art of Xing Yi Quan, producing a solar system within his dantian. His innate talent tramples over all the geniuses, and even the geniuses among geniuses.

His powerful spirit and ruthless and ambitious nature, no matter who he is reborn into, will never change! Slaughter is instinctive, being cold-blooded is his personality, exterminating an entire family is only a means towards a goal, cruelty means infamy, and chasing after women… is just an interest.

- 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.

Legend says that Star World’s million Star Names are passed on in the form of young maidens as famous existences in the Three Thousand Worlds.Henceforth, Chen Mo heroically says as he brandishes his massive weapon at the heavens and shouts towards the beautiful but aloof Chen Qingzhi, towards the tyrannical Caesar, the tsundere Xiang Yu, the yandere hi*ler, the extraordinary Chen Tuan, and other girls.“My big stick’s hunger already can endure no longer…”

Feng Yun transmigrates into a fantasy world filled with magical powers and immortals.Just as he was wondering about his future, the system activated...[Ding, activation confirmed. The novice gift package will be issued automatically.][Ding, congratulations to the host for obtaining a random special physique: Sacred Dao Body of Chaos.][Ding, congratulations to the host for obtaining the Supreme Foundation Building Treasure.][Ding, congratulations to the host for obtaining a hundred million top-grade spirit stones.][Ding, congratulations to the host for obtaining an immortal grade soul-strengthening elixir.]Hahah... money, power Immortality, beauties, I am getting all...