From A Stronghold NPC To The Final BOSS - Chapter 1020 - : Official rise

Kurokawa Risa is an ordinary office worker, who has practiced lots of cooking while living alone. One day, she wakes up in another world, with a concerned little spirit hovering over her! She has apparently been transported to a magical, spirit-filled realm by the will of the goddess, and there is no known way for her to go back. She is taken in by a wealthy couple, and they and her new spirit helper treat her with nothing but kindness. There is one problem, however–the food in this magical world is gross! Risa insists on helping the household cooking staff prepare a traditional meal from her world, and it is a big hit with her hosts. Soon Risa knows what she should do in this new world; she should open a cafe and treat everyone to delicious food!

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.

Lu Changsheng, who traveled through time and became an apprentice in the Miaoshou Garden, originally wanted to work hard to be a generation of genius doctor who can help the world. But when he started to practice martial arts, he found that every time he practiced a martial art to perfection, he could improve his understanding.

Moreover, understanding seems to be able to improve all the time. Lu Changsheng wanted to know, where is the upper limit of comprehension?

Unremarkable: Slightly better than crap.

The posture of the middle man: obscuring everyone without knowing it.

Possesses great potential: Xiao He has just shown her sharp corners.

Qianlong in the Abyss: Flood Dragons Come Out of Shallow Water!

Praise from all sides: Show your sharpness, unstoppable!

Dragon and phoenix among men: The name of genius spreads all over the world!

Praise for centuries: Founding a sect and establishing a sect, calling the sect and being the ancestor!

A born sage: astonishing the past and the present, unsurpassed!

There is no one in all ages: there is no one before and no one after!

Top savvy: unspeakable, unseen, unheard!

…

The finished volumes of “Mage Profound Truth”, “Eternal Martial Arts”, “Longevity Seed”, “Old Master” and “Survival Seed” are all excellent works, produced by Lao Yue, they must be excellent!

- Description from novelbuddy

Xiang Yi was most famous vase in the entertainment industry. The subject of ridicule on the world wide web, she suddenly announced: She was going home to farm. Her anti-fans: Hehe. She deserves it. The next day, Xing Chen APP started a live broadcast stream of Xiang Yi's rural life. Heh? Why did a top ranking lawyer stop by for dinner? Heh? Why did a doctor come to raise chickens? Heh? Why is a famous fashion designer here to dye cloths? And why is an esports legend installing a swing set? What, you're her brother? You're also her brother?? As the much anticipated grand slam actor Shi Sui made his grand descent into the scene, the anti-fans began to tremble as they weakly typed out on the screen: You... Are you also her brother? The film star calmly squeezed Xiang Yi's cheeks and says indifferently: I am her husband. The anti-fans: Unabletolaugh.jpg