I Can Make Everything Level UP - Chapter 688: Relics (2)

Shen Gu, an ordinary university student who discovers that he is a “spare tire” in his social circle.With the help of a system, he gradually rises to the top of life!

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.

As a new anchor of StarTV, Yu Yan’s ruthless trash-talk, natural rifle-shooting skills, and character of never searching houses earned him a big crowd of fans.

He felt like he was a good anchor who treated all fans of his stream equally—you can suck at the game, you can get knocked down, but if you want the gun in my hand, sorry, no way man.

Until he heard the voice of the streaming platform’s Big Boss.

Yu · ultimate voice-con · Yan: I’m not familiar with this game, swap my Kar98k for your Mini-14.

Yi · brand new noob · Chen: En.

Friend: Daddy, I want to snipe too!

Yu Yan: I think this frying pan suits you very well.

Not-a-very good gamer but dripping with money and looks Big Boss vs Cute, super good trash-talking gunslinger voice-con Anchor.

- Description from Novelupdates

Spend life energy to infuse martial arts, and you can perform unlimited deductions.

Shen Yi’s mortal body only has a lifespan of less than a hundred years. Fortunately, he can gain his remaining lifespan by killing demons.

In the troubled times where evil spirits are everywhere, the long sword is revealed, causing the liver and gallbladder of these creatures who have lived for thousands of years to burst!

From [Eagle Claw Technique] to [Eight Desolations Splitting Heavenly Hands], from [Demon Subduing Fist] to [Golden Body Prison Suppressing Dharma Appearance]!

Shen Yi occasionally ponders, how come this lifespan is getting longer with more use?

He put the sword into its sheath, raised his eyes to the sky, and heard that there was a Jade Palace above the clouds. It was filled with thousands of saints, each of whom had experienced endless years.

This time I came to heaven just to borrow a million years from the immortals to prove my path to immortality.

- Description from novelbuddy