Married to the Male Lead's Brother - Chapter 15:

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.

Song Shi came to an immortal world where demons and monsters were rampant. He thought he was going to take a trepidatious road to immortality, but ended up awakening to a death-defying system, gaining strength from death and getting stronger every time he died.

The whole style took a sudden change. Other people cultivated to seek immortality, but he was already immortal, and could only seek immortality by having himself killed in various ways, either by killing himself or by letting people kill him.

“You were killed 10 times by the Yin spirit, awakening the spiritual root of fire!”

“You were killed 10 times by the zombie, awakening the innate divine power!”

“You were killed 10 times for excess cultivation, awakening the Daoist heart!”

“You were killed by a formation, formation level +1!”

“You were killed by an alchemy explosion, +1 alchemy level!”

Pure Yang Spiritual Body, Nine Yang Divine Body, Sun Sacred Body; Vajra Spiritual Body, Golden Divine Body, Draconic Sacred Body; Psychic Sword Body, Innate Dao Body; Formation Master, Alchemy Master...

His cultivation was a fun journey, and he kept finding ways to kill himself on his way to the top of the immortal path...

Years later, the world rumor had it that once Song Shi died, the immortals were terrified, the demons trembled, and ten thousand Buddhas retreated!

Chen Rui, an otaku from earth, is reborn into a human body in another world, who falls into the legendary evil, brutal world of the devil called Mozu where humans are treated as food. He has to survive while facing horrors of the devil, violent dragons and a variety of powerful enemies by depending on a strange super system chip and his wits. Surrounded by Devil’s beauties such as black-bellied lolita princess, cold queens, violent dragons, charming poisonous devils …

Wanting to live in the Devil’s world is hard! Wanting to live in the Devil’s world as a human is harder! Wanting a human to be the devil’s son-in-law is hardest!

Let us see how a small otaku uses power and strategy step by step starting from an ordinary human to writing a legend as the devil’s greatest son-in-law.

A petite and frail woman came to Donggong, and Chumei in Donggong didn’t take this abandoned woman seriously at first.

Who would have thought that she would occasionally feel the cold today, and she would be ill tomorrow, attracting His Royal Highness to take care of her day and night.

She took care of her, and took care of people on the couch, so angry that Zhongmei called her a shameless white lotus.

As the party concerned, Qin Zhao said: My ex-husband greened me, I turned around and hooked up with the prince of the dynasty, and robbed the prospective man of the third child. The first marriage is higher than the first marriage, is there any problem?

**

The crown prince Xiao Ce had few desires for half his life until he met Qin Zhao.

He thought Qin Zhao was pitiful and would not be able to live without him, so he let her live in the East Palace temporarily, day and night to keep her pampered.

Later, when he ascended the throne, every time he saw Qin Zhao’s ex-husband’s face, he would torture Qin Zhao’s soul every night: “Is my body still satisfactory to Zhaozhao?”

【Wear the book, double clean, sweet pet】

- Description from novelbuddy