Monarch of Entropy - Chapter 12: Tap Out

A world where waves of monsters descend every night...A world where only the strong can survive.Axel, a burned-out man from modern Earth, wakes up in a desolate wasteland with nothing but a strange “Harem Settlement System” with him.Given the power to build, command, and grow stronger, he sets off to carve out a safe haven in this broken world. But as his settlement grows, so does the number of beautiful and deadly women drawn under his blanket-ahem!-banner.Witness Axel's journey, rising to to the peak. From a simple, lone survivor to becoming the Wasteland Overlord. With the help of the loyal, dangerous, and irresistible thirsty harem girls!

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.

Yang Feng somehow transmigrated into a different world and received a legacy of an ‘ancient high tech’ family, which does not directly raise his power, but gives him the technology to build things which are way more advanced than the seemingly medieval world.

Gu Fei transmigrated to the Dou Qi Continent and became the beloved grandson of the Black Submerged King, Gu Lie. By the age of sixteen, he had become the most outstanding genius of the Gu Clan.After that, the clan leader Gu Yuan summoned Xun'er back and betrothed her to Gu Fei! However, after their marriage, even after six months, Xun'er still refused to consummate the marriage with Gu Fei. Although Gu Fei was initially deeply infatuated with Xun'er, he realized that her indifference towards him was because she was attached to another man.His heart completely broke! It turned out that when Xun'er said she wasn’t ready, she actually intended to keep her chastity for someone else! How could Gu Fei tolerate this? He decisively chose to divorce Xun'er!“No, Gu Fei, you have to believe me, I have never betrayed you!” Upon learning that Gu Fei wanted to divorce her, Xun'er immediately panicked.------------This is a translation------------Original Author: 暴走的男神Raw Name: 斗破：娶妻薰儿，她却拒绝圆房!