Richest Man: Divine-Grade Reconstruct System - Chapter 31 Where is my rolling pin?

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.

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!

After what seems to be a plane accident,

Su Bai Master Su was seized of his power and unexpectedly reincarnated onto a cowardly distant nephew.

Who said that you will lead a dull life after rebirth?

The ‘Jade-Faced Yama’ who once ate both the black and white path

vows to take back the power that once belonged to him step by step.

Do you really think Master Su is a rice dumpling for everyone to push around when he does not display his wrath?

- Description from Novelupdates

Under the starry sky, all races compete for the front.

The human youth Ye Huan has mutated eyes.

Don’t forget, it’s just basic exercises.

Martial arts, just watch it once.

If you read the exercises once, you are cultivating.

The medicinal pill came out after watching the refining process, and it could be optimized.

Yuanguo, Yuancao, the year has increased at a glance.

Ten thousand clan exercises and secret skills, just looking at them, they become human clan exercises and secret skills.

…

Under the starry sky, Ye Huan convinces all the tribes.

- Description from novelbuddy