From Bullets To Billions - Chapter 55: The Second Worst Day Of My Life

Introduction: Su Muge, a God’s favored girl in the medical community, became an ugly girl due to time-space travel. Her father disliked her and her mother was too cowardly to protect her! Xia Houmo, a lonely wolf who was haughty and ever triumphant in battlefield, was asked by the emperor to marry a useless and ugly girl! On their wedding day, there was an assassin and he took her as a shield, as a result, she was wounded. Su Muge smiled slightly with crimson eyes, “Xia Houmo, I owed you, and I pay you now.” Seeing her red blood, his heart hurt… “Su Muge, you owed me too much and you must pay me birth after birth!” The heroine was not beautiful and not omnipotent, but she had golden light and magic hand.

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.

[Female lead space + male lead rebirth]

Yin Miao just picked up an angry book from the ruins of the apocalypse, and accidentally entered the book and became an exiled unlucky person. It’s just that there are poor mountains, bad waters and hungry people everywhere, and they also drag a family who are used to the fine clothes, jade, food and grains.

Fortunately, the system sent an initial mission gift package-a space, but she just planned to develop the village into her own vegetable basket, meat plate, rice bag, and natural disasters and wars came.

Yin Miao cracked…

“Where A Miao goes, I will go.”

Seeing the bright woman who was packing things everywhere and preparing to take her family to escape, Xiao Xuan leaned against the tree and said with a smile.

Refugee Yin Miao hid the food stock that was about to explode at any time, and remembered that the plot mission had already deviate from the 108,000-mile mission, she sighed and asked, “Will you also go to the place where you lost your head?”

“Then I’ll go even more.”

A flicker of anger flashed in Xiao Xuan’s eyes, and this time, no one could move the slightest bit of what he wanted to protect.

- Description from novelbuddy

He possessed the Xuan Gate Medical Arts and had fortuitously obtained a heaven-defying Spiritual Treasure!