Mr. Gu, Your Replacement Bride Is A Big Shot! - Chapter 1794 - Stop

Once upon a time, there was an office worker who was dragged by his boss to take a hot spring bath. While he was soaking…

This is probably very serious. He came to a Beast world and was licked out of his sleep by a golden lion. The lion accompanied him. Only then did he understood this world… when he came to the lion’s tribe, he found that this was really not an experimental base…

- Description from Novelupdates

Suddenly, a huge earthquake occurred all around the globe, throwing everyone into a desolate world.

The humans of the new world were primitive. They lived their lives facing all sorts of dangers every day, from hurricanes to attacks from huge beasts.

The humans that were brought to this world all received a totem and an egg.

Placing the totem on a certain land would turn the place into the person’s new tribe. Everyone could expand their tribes according to their strengths.

The eggs contained various beasts that would grow into humans’ most loyal companions. Humans would have to struggle to live in the desolate world with their companions and protect their own lands.

Just as Ye Chen was about to hatch his egg, he noticed he could read hidden hints.

[Monster Egg: Place a drop of blood to hatch.]

[Hidden Hint: Hatching the egg now will reward you with a Rank E Mutated Beast, Spiny Turtle.]

[Hidden Hint: Hatching the egg in 1 minute will reward you with a Rank D Mutated Beast, Dangkang.]

…

[Monster Egg: Place a drop of blood to hatch.]

[Hidden Hint: Hatching the egg now will reward you with a Rank E Mutated Beast, Yellow Horse.]

[Hidden Hint: Hatching the egg in 30 seconds will reward you with a Rank C Mutated Beast, Tiger Fish.]

[Hidden Hint: Hatching the egg in 60 seconds will reward you with a Rank SSSSS Mutated Beast, Immortal Phoenix.]

…

A few years had passed since then. Ye Chen led a group of Rank SSSSS Mutated Beasts and said confidently, “My success is the result of my hard work!”

Special police officer Li Yu was reborn on the body of a little girl who was abused to death by her fiance’s family in Dayong Dynasty after saving people and sacrificed. Special police officer Li Yu was reborn as Li Yu in ancient times.

In my hometown, the former fiance’s family took back the property left by the original owner’s father, smashed and countered the murders of the Zhang family again and again, and rescued the scholar in the next village when he went hunting in the mountains.

When the wind and water came up, the sudden locust plague was followed by a disaster of war…

- Description from novelbuddy

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.