MTL - Young Man, You Are Too Young, Too Simple - Chapter 52

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.

Pet shop owner Tang Wan was accidentally reborn into an interstellar world. When he opened his eyes, he found himself automatically married to a vegetable via the StarNetwork. A social status worth ten billion yuan; but with an unconscious husband, he was unable to withdraw any money. Tang Wan held the empty position of the First Gentleman, but was, in fact, a poor man.

In order to secure his future livelihood, Tang Wan was bound to the “Earth Pet System” and returned to his old business, with the goal of saving money, getting a divorce, and looking for a second spring!

After thousands of years of evolution, Earth’s energy depletion had long been abandoned to the distant corners of the Milky Way. All of the animals in the galaxy had evolved tremendously, and little furry cute ones only lived in textbooks. When Tang Wan and his cute little ones appeared, they became the treasures of the whole universe! The pet shop soon became famous in the interstellar world, and the whole universe lined up to be cat slaves~

Finally surviving past the compulsory marriage period, Tang Wan happily took off the diamond ring worth billions: he can finally sell it for money!

However, Tang Wan could never have imagined that when he sat down at the dining table on a blind date with some fresh meat, the vegetative partner that he had come to an agreement with would suddenly open his eyes.

Gong: I heard you sold your wedding ring for one billion yuan?

Tang Wan reached out and pushed him down on the bed: Open what eyes, quickly close them.

- Description from Novelupdates

Vainqueur Knightsbane is your average dragon: a giant, fire-breathing lizard who loves to take naps on his golden hoard, kidnap princesses for fun, and make the life of adventurers miserable. Vainqueur's only pleasure in life is to watch his treasure get bigger, one coin at a time.

So when a would-be thief turned unwilling minion tells him about "classes," "levels," and "quests," Vainqueur wonders if maybe, just maybe, he should consider a career change.

After all, why bother hunting monsters for free when you can get paid for it?

One day, Emperor Wu Ling discovered, every night he would become a stone, kept on the jewellery box of a lady, embarrassing beyond embarrassing.

One day, Zhao Jin Yu discovered, the stone on her jewellery box could actually speak! Awkward beyond awkward.

This stone had a malicious tongue, harsh, two-faced and indifferent, Zhao Jin Yu itched to throw it smashing it to pieces…, who knew one day, wanting to save herself she used it to block a sword, it really did shatter, she cried for a very long time.

Again one day, Zhao Jin Yu was drafted into the palace, she discovered unusually, the emperor was like this he had a malicious tongue, harsh, two-faced and indifferent…

- Description from Novelupdates