Marvel: Impregnation System - Chapter 169 - 163: The Problem With Addiction (R18)

In a world dotted with World Entrances to a demon world, demons have invaded humans for centuries. Humanity has united and one of the most ancient sects in the world, the Archean Mountain Sect, has set up an entire education system in the form of Dao Academies and defenses at the World Entrances.

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.

The world ended, seven days of earthquakes, volcanic eruption and then came the meteor storm, bringing something worse—mutation.Now, survivors are group into Shifters, mutated humans and normals.Ava Zhang was supposed to be a Normal. Useless. Disposable.Thrown into a military-controlled bunker, she is sorted into Level Three—the bottom rank, where the weak are left to rot. Starving, overworked, and surrounded by desperate scavengers, she realizes that in this world, strength decides survival.But Ava isn’t as powerless her hidden System activates. The Blueprint System—an ability that lets her design and invent anything, from weapons to high-tech defenses.

Writing, drawing, and occasionally pretending to be a master of calligraphy, fooling people into paying customers with a lot of money…

This is Lin Zhishui’s light and comfortable little days.

However, he didn’t know that the guests of his calligraphy and painting shop who loved the ancient style and traditional culture were actually strange people who practiced in the world.

The guests never thought that the most mysterious and unpredictable figure in the cultivation world was just a mortal who liked to play dumb puzzles?

so-called-

Cross-server communication is barrier-free, and you can rely on your brain for guidance!

After many years, Lin Zhishui finally understood the truth. Looking at the brush that had accompanied him for many years, the corners of his mouth twitched:

“This is poisonous!”

…

[ps: When you are bored, you can look at the other two works by author Jun, “I heard that I am super fierce after my death” and “The Strongest Internet God”, which are relatively short, light spray, orz]

- Description from novelbuddy