Reborn as the Princess' Knight (GL) - Chapter 191 School Opening (V).

Fang Mo’er found out that she transmigrated into a novel that gave her nothing but anger when she read it. Moreover, she became the female supporting character with a miserable ending! The female supporting character that she became gave up her family fortune and career to compete for the male lead’s affection. Even so, the male lead still cheated on her with the female lead on their wedding night! According to the original plot development, Fang Mo’er would swallow her anger and still choose to marry the male lead. Eventually, the scum of the earth would cheat her of all of her resources for the female lead. Simultaneously, she would also do something crazy out of jealousy and eventually destroy her own reputation. Fang Mo’er decided that she would never walk down this path again! —In front of the Department of Civil Affairs, Fang Mo’er, who just transmigrated over, hung up on the scum’s call that meant to tell her to postpone their wedding. Coincidentally, a handsome man clad in a suit walked to her side. The man said, “Miss, since your groom isn’t here and my bride ran away, why don’t we get married instead?” Fang Mo’er did not pay too much attention to him and wondered who he was instead. She did not recall having such a stale plotline in this novel. The man continued, “Oh, I forgot to introduce myself. I’m Shi Mo.” Fang Mo’er’s eyes nearly fell out of her sockets. Shi Mo? The man who only appeared once in the entire novel; the CEO of the world’s biggest entertainment company? What else could be more vengeful than marrying Shi Mo to disgust the scum of a couple? “Deal!” The current Fang Mo’er was still immersed in the anger and vengefulness from the novel. Hence, this was just her trying to change the fate of a character. However, she forgot that she had become Fang Mo’er, and at this moment, she had just chosen the man who would accompany her for the rest of her life.

Getting lost in a trip made Tang Siyu be mistaken for streetwalker, and she lost her wedding night. After returning home, she found the fiance cheat her with her sister. She cancelled the wedding in anger and declared missing.

Five years later, she came back with her gifted son. Unexpectedly, her baby took part in the piano competition in order to find his father. “My name is Tang Bao, my mother is Tang Siyu who is super beautiful! I am four and a half years old this year. If there is a man who looks like me may be my father. Please contact me! ” Behind the scenes, a woman was mad. A few days later, the mysterious man called himself the father of her child. Tang Siyu looks at this tall and handsome man who looks like her son. She is angry. So, he was the bastard five years ago?

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.

Her original self was a powerful jiangshi who had cultivated for innumerable years. However, when she attempted to unlawfully enter the world of the immortals, she was discovered by the Jade Emperor and thrown into the mortal world as punishment. Her soul then left her corpse, fusing with the body of the Motian Dynasty’s sixth princess. She didn’t even have a chance to fully comprehend her current circumstances before her maid unexpectedly ignored her mistress, even publicly provoking her!

“What? That weak and cowardly idiot who has neither her father’s love or mother’s favor actually mistook her older sister as her maid?! All the royal princes in the world loathe her?”

“Damn you! This old lady will let all of you understand why the flowers are so red!”

“Hey! Did you hear? That cowardly sixth princess unexpectedly snatched away the man that the eldest princess favored today!”

“How is that interesting news? That fourth princess who ran always ran amuck in the capital city is now confined to her bed now!”

The good-for-nothing counterattacks! The previously cowardly and incompetent sixth princess suddenly reveals her exceptional talents! She is full of radiant elegance, and unparalleled disdain!

She is driven by the desire to shed no more tears! However, if she had known what would happen later, she would have been better off acting stupid! She had calculated thousands, tens of thousands of scenarios, but had never calculated one where one day, her own prey would unexpectedly turn around, and ruthlessly bully her instead! Damn it, she still hasn’t sucked any blood yet!

- Description from Novelupdates