The Strongest Wizard Becomes a Countryside Guardsman After Taking an Arrow to the Knee - Chapter 406 - Noon at Elkay, I Awake.

Important notice, The Prodigal Son of the Ming Dynasty, also known as “Ming Song”.

Hongzhi eleven years.

It’s a beautiful morning.

At this time, Zhu Houzhao was just an adult.

At this time, Wang Shouren and Tang Bohu were sharpening their swords and preparing for the imperial examination.

At this time, the Little Ice Age has come, and the long and severe cold is raging on the earth.

At this time in Nanhebo’s mansion, Fang Jifan, the idiot son of the landlord’s family and Nanhebo’s direct heir…began his shameless prodigal life.

- Description from novelbuddy

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.

Q: How would you approach your target?

Tiger Tribe:
Jiang Yu (excited): “Cure him, give him medicine!”

Future Mecha:
Duan Jingzhe (at a loss): “… umm … feed him expired nutrients?”

Ancient Court:
Donghao Yang (banter): “Follow nature’s example and flirt shamelessly.”

Next unlucky protagonist: “…”

This is a collection of three short stories in which each protagonist crosses to another world or is reborn.

- Description from Novelupdates

Liu Ergou grew up in the village and studied medical skills with his grandfather. After his grandfather died, the responsibility of treating the villagers falls on him. But an accident bestows upon him an inheritance from his great-grandfather, which sets him on the path to invincibility!