Later, He Became A Royal Healer - Chapter 135 - Surname You.

Lacking a pocket dimension, lacking a power, lacking a thigh to hug onto and the three life advantages (money, power, and looks), he had been cautiously living in the apocalypse for ten years, getting closer to falling inside the zombie’s mouths. But unexpectedly, he had the terrible luck, to be caught in a fight between two gangs and die, it really left people feeling disappointed.

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.

What? He’s transmigrated into an apocalyptic novel?

What? He transmigrated into a white lotus?

What? The white lotus killed the main character shou (bottom, uke) and even proudly became a mistress?

Oh, luckily the white lotus in the apocalypse has a thick thigh to hold on to (someone to rely on).

What? This was actually an apocalyptic rebirth revenge story?

What? The thick thigh was actually a really big cannon fodder?

Therefore, this is the dramatic story of a man who transformed into a white lotus struggling to survive in an apocalyptic rebirth revenge novel, trying to avoid the reborn pig’s foot (the original main character), and trying his best to get away from the cannon fodder gong (top, seme).

- Description from Novelupdates

This is the story of the youth Wen Leyang, born into the family with an expertise in the cultivation of the Art of Poison.