MTL - Demon King/The Parting of the Orchid and Cang - Chapter 73 Start reading

Song Yan, a senior high school student, lost his parents when he was a child. Before obtaining a mysterious and amazing ring, he has been often plunged into a vulnerable position and easily marginalized. However, his life is changed because of the cryptic ring.

- 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.

In her previous life, the woman that her husband cheated on dug out her beautiful eyes, told her that her child was not her husband’s and then tortured her to death. Her six year old son, Tiantian, was harmed by the adulterer while her parents were brutally murdered…

Hua Qiyue woke up again and found out that she was now in the body of a famous general’s daughter, who shared the same first name as her. However, she discovered that the body was a useless one as her Qi veins were blocked! Since the heaven did give her another chance of life, she promised herself to destroy the life of her cheating husband, torture the home wrecker, seek revenge and save her son!

By accident, she discovered a handsome devil inside her jade gourd and was forced to acknowledge him as her master. What troubled her more was that her first appearance in the public caused her to be surrounded by numerous handsome men such as the cool and mysterious Prince Nan, her cruel but strong master Tianpi, and the kind and graceful Medical Saint…

Tianyuan continent was the continent of Qi Art and Spirit Summoning Art… Watch how Hua Qiyue master the two Arts, defeat her rivals and solve one mystery after another…

- Description from Novelupdates