I Quit Being The Male Lead’s Rival - Chapter 128

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.

Su Yu, who was attempting to create a second account in the VR trading card game “Yu-Gi-Oh! World Link Online”, inexplicably traveled to the game world, and even had his own NPC identity.Time went back to one month before the game was launched, the nameless Pharaoh was still sleeping in the body of the high school student Yugi Muto, and the Duel City with cross-generational significance had not yet started.When the game was officially launched, players logged in and found that there was a new NPC in the game that was not in the original game.Yuei Vu: Do the players over there want to buy a booster box? Fifty-one packs, five hundred and ten cards, fair price, no cashback!The players stared directly at the Pot of Greed marked as UR in the product list, their eyes were burning, and the same thoughts came into their minds…

I became a scientist for an evil organization.…But I’m too competent.

Xia Changge is a timid and honest cultivator who has practiced for thirty years without even killing a chicken.

His ordinary life changed after he was killed because his fellow Daoist next door went out to seek opportunities, and begged Xia Changge to help take care of his wife and daughter…

Longevity flow, independent family flow.

- Description from novelbuddy