I Can Accumulate Proficiency, Starting from Alchemy - Chapter 519 - 259: Late-stage Golden Core, Thrilling Immortal Mountain_3

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.

A bittersweet drama: As long as the heroine forgives her kindly and kindly, pays without regrets, and gives up again and again until the bad guys who bully her are old and unable to act, she will get a happy ending.

When Mercury is dressed as the heroine of each bitterness drama…forbearance? Pooh.

Terrible heroine, change her life online.

Content tags: Time travel, face slap, fast wear, cool text
Search keywords: protagonist: mercury ┃ supporting role: many ┃ others: fast wear, cool text

- Description from novelbuddy

Ye Hao travels to the world of horror recovery.

It is full of demons, ghosts walking at night, and aliens with awakened abilities.

Ye Hao, who has always been more salty, did not expect that the golden finger would be so powerful that it would automatically level up.

“A good meal, Liuku Immortal Thief is in a beautiful mood, and the speed of cultivation is doubled.”

“Gu Lingqian will sense the presence of a Specter nearby, and he will be excited, and the training effect will increase by 70%.”

“The speed at which you made the talisman is too slow, the sky is the ****, and you have realized the mystery.”

“You haven’t touched a beautiful woman today, you are in a low mood with both hands, and you have no progress in your practice.”

“You watched a small movie, and Daluodongguan was very excited and fell into a state of epiphany.”

…

Ye Hao really didn’t think about working hard, but his eight strange skills were too good.

- Description from novelbuddy

Cheng Yan transmigrated only to end up in a medieval Europe like world, becoming Roland, a Royal Prince. But this world doesn’t seem to be the same as his former world, despite some similarities. Witches are real and they actually can use magic?

Follow Roland’s battle for the throne against his siblings. Will he be able to win, even though the king already declared him to be a hopeless case and with the worst starting situation? With his knowledge of modern technologies and the help of the witches, who are known as devils’ servants and are hunted by the the Holy Church, he might have a fighting chance.

Now, let his journey begin.