Eternal Life: My Lifespan Increases Daily - Chapter 13: Body Refinement

Jiang Feng, a handsome young martial artist, was injured during a misadventure and ended up being saved by the sisters Yaoyue and Lianxing of the Palace of Shifting Flowers, who were considered the most powerful female martial artists in the pugilistic world. The two sisters fell in love with Jiang Feng, but he spurned them because of their arrogance. Instead, he fell in love with their servant girl, Hua Yuenu.

Jiang Feng and Hua Yuenu were forced to flee from the Palace after Hua became pregnant with Jiang’s child. However, they ended up being betrayed by Jiang Feng’s servant, Jiang Biehe, and attacked by bandits. During their harrowing flight, Hua Yuenu gave birth to a pair of twin boys abut ended up dying together with Jiang Feng during a bandit attack. Yaoyue and Lianxing soon caught up with the couple only to find them dead. Refusing to forgive Jiang Feng for rejecting her love, Yaoyue vowed to take her revenge by making his two sons destroy each other. To do that, they adopted one of the boys as their own child and abandoned the other.

The other boy was soon saved by Yan Nantian, Jiang Feng’s sworn brother and one of the most powerful martial artists in the pugilistic world. Unaware of the first boy’s fate, Yan Nantian pursued Jiang Biehe into the Villains’ Valley, a place populated entirely by criminals. There, he encountered five of the notorious Ten Great Villains whom he defeated easily before falling into a trap set by them. The villains ended up torturing Yan Nantian till he fell unconscious, but chose not to harm the second boy, instead deciding to raise him as their apprentice in order to groom him into the greatest villain in history.

Five years ago, Gu Jiayu, who climbed out of the mountain nest, entered the entertainment circle in order to cultivate, and in order to overcome the shortcomings of emotional gaps, he used an excellent acting skill to hook up a Chinese “little nobleman” abroad. After a month of falling in love and feeling love, he ran away with guilty conscience after the other party proposed marriage.

Five years later, Gu Yingdi had become popular all over the country, but he had a four-year-old son beside him. 

One day, the little handsome guy pointed at the man who took up the entire page in the financial newspaper and said, “Dad, this man looks like me!” Gu Jiayi glanced at the calm, handsome man in a suit and shoes in the newspaper, and asked with a guilty conscience, “He has an onion head, and his body is black and black like the top post. Are you sure you look like him?” That night, “Top Door Post” came to the door … Gu Jiayu, “My son, hide your tail!”

- Description from Novelupdates

Chi Yan had always had a weak constitution, and ghosts had always tried to kill him. He had tried many ways to change his situation, but it was all futile.

Coincidentally, Third Master Ye of Shiming City passed away, and a priest informed Chi Yan that Third Master Ye possessed the “look of demon,” Carrying a bit of this man’s ashes and installing an altar for him at home could help control the evil spirits around Chi Yan.

Left with no choice, Chi Yan took a gamble. Amazingly, it worked. However he didn’t expect that he’d be instead be haunted by the most persistent ghost of them all.

Obsessed with love, undying resentment, possessed by evil.

- Description from Novelupdates

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.