CASSANDRA: The Unfavored Princess - Chapter 90: Come With Us

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 young president, Yu Shu, is vigorous and unsmiling. The outside world commented that she is a high-altitude flower that can be seen from afar but not to be played. Prejudice.
At first, she hated Zhao Qingying, just because this woman delayed her brother’s study, and later, it was because… she was too profligate.
Xiaolang’s hooves should be cured!
Later, really fragrant——
One day, my younger brother saw his idol sitting in his living room, and said pleasantly, “Brother Ying, why are you here?!”
Yu Shu said meaningfully: “Well, it’s indeed a big wedding.”

Zhao Qingying’s flourishing beauty is the center of the topic, the darling of the media and the favorite of the paparazzi, and there will never be a shortage of gossip targets around her. One day, she was interviewed.
Host: “The boss of the hotel is dating you, is it true?”
Zhao Qingying: “My brother.”
Host: “The financial tycoon is rumored to be your benefactor, is the news reliable?”
Zhao Qingying: “My father.”
The host asked weakly: “Then Yu Shu, who has been in frequent contact with you recently, who are you?”
Zhao Qingying looked at the camera, her eyebrows and eyes curved: “My wife.”

The cold president who is obsessed with making money from games X the big star who only cares about teasing girls

[Don’t ask, it’s sweet to ask! 】
Content tags: powerful rich family entertainment circle sweet text
Search keywords: Protagonist: Yu Shu (shu), Zhao Qingying ┃ Supporting role: ┃ Others:
One sentence introduction: can’t laugh.jpg

- Description from novelbuddy

Unconditional obedience to him? Dream on! Regrettably, after marrying Tang Yuchen, An Ruo's daily thoughts were of escape, escape, and more escape! Someone grew furious, “You want to flee? The only way out is if you die, or I perish!” Fine, she chose death! Yet he laughed wickedly, “Woman, do you intend to kill the son in your womb?”

In a future timeline, the earth was visited by a species known as the Slarkovs.
Having lost their home planet and in search of a new one, earth was the next habitable planet for them.

Humans and Slarkovs made a deal with each other in return for the Slarkovs living on earth.
The Slarkovs traded their technology and knowledge for a new home.
They were similar to humans except for some of them who had slight differences so fitting into the society wasn't a problem.
Over the years Slarkovs and humans began to mate with one another and reproduce offsprings.
This in turn created a new species known as the mixed-blood.
Centuries later mixedbloods could tap into their bloodline and perform unimaginable feats.

Gustav born into an age where bloodline determines everything, struggles to fit with a useless bloodline.
His bloodline only grants him the ability to change his hair color, destroying his hopes and dreams for a great future.
His fate is turned around when an unexpected situation leads to him finding a system that grants him the power to unlock and upgrade bloodlines by completing quests but he's baffled by two quests with a five-year deadline. Success will grant him unimaginable rewards...
But only one thing awaits him if he fails... Death!

Follow Gustav on his interesting journey filled with unprecedented adventures, danger and death, maybe?