Patriarch is Taking Concubines Again! - Chapter 89

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.

Li Xiaofei, thrust 500 years into the future, finds himself as a young orphaned man in a harsh, post-apocalyptic world. Raised by a woman only slightly older than himself in the unforgiving slums, he quickly learns that survival requires both strength and cunning.In a world ravaged by alien star beasts, where gangs rule the streets and political factions vie for control, chaos is the order of the day. Amidst this turmoil, Li Xiaofei must carve out his own destiny. Armed with the mysterious Moonlight Treasure Box, he embarks on a perilous journey to make a name for himself and protect the ones he loves.Will Li Xiaofei rise above the chaos to bring peace to his world, or will he be consumed by the darkness that surrounds him?Official BlurbThe star beasts invaded, and Earth’s civilization collapsed. A young man, wielding the artifact Moonlight Treasure Box, drew upon the legacy of three thousand martial arts techniques from various worlds. He protected humanity, won the hearts of beautiful women, slew star beasts, suppressed myriad races, ruled the universe, and commanded the heavens. In the vast cosmos, he was invincible!

A back-to-basics(?) monster evolution novel.

Avery Carter discovered that she wasn't her parents' biological child.After living with them for so many years, she discovered she was separated from her twin sister, during a fire at the hospital where they were born. In the chaos, the twins were switched, and she was sent home with the wrong family.She was a fake heiress.When their real daughter returned, she was abandoned and she was sent away to her barren birthplace.After returning to her real family, many people expect her to fall from grace, but she surprises everyone by lifting her biological family out of poverty.Rising to the upper class, she befriends celebrities and engages in battles of wits and courage with bitches and jerks.Now the most important thing for her is to draw a clear line with this dangerous billionaire, Alexander Moran, a businessman who arrived in the City on a mission to secure a deal with V Group and find medical help for his sister. However, meeting Avery turns his attention to her. He is fascinated by her strength and the way she handles everything thrown her way. The more he interacts with her, the deeper his admiration grows.What starts as a business venture soon takes a personal turn. Alexander is not only impressed by Avery’s professional abilities but also her charm. As they get closer, he finds himself wanting more than just a business deal – he wants to win her heart too.