MTL - Magic Chef of Ice and Fire - Chapter 46 The beginning of war (below)

Xu Jiayan is sick, suffering from a condition where he can't stand to see Jiang Yuan cry. Whenever the young girl sheds tears, he just can't help but feel weak in the knees.However, one day, after accidentally catching a glimpse of her slender waist, he feels his condition has worsened.He finds himself wanting to make her cry,yet he has no desire to seek a cure—How fatal!One-liner:A pseudo-sweetheart vs. a true scholar;Childhood friends turn lovers with a twist of love and war;From school uniforms to wedding gowns, only accompanying you.

By the year 3029 CE, Earth’s technology has developed rapidly, borders no longer exist, and Earth has been unified, marking the beginning of the era of the Federation.

At that time, a huge sword flew from the heavens, piercing the sun and causing a huge sensation on Earth.

Perhaps because the scabbard of the sword was already in tatters, countless shards have broken off from it following the collision with the sun and spread across the universe. Many of these shards have landed on various places across Earth.

With the arrival of the bronze sword and its shards, a new unlimited energy source has suddenly appeared on Earth. This energy source has since been named Spirit Qi.

Spirit Qi is like air, thick in some places and thin in others. As the Federation and other factions gather more shards, they discover more information on cultivation, pill refinement, Spirit Stone refinement, and other techniques. The words on the shards have an ancient feel to them, making it a trend for people to use ancient language.

The appearance of Spirit Qi rapidly makes the original energy sources obsolete and has completely changed people’s lives. Not only has the Spirit Internet been formed, Spirit Qi has also changed the course of Human Civilization, causing the world to enter a civilization of cultivation. This would later come to be known as the Spirit Inception Era.

- Description from Novelupdates

Cao Shaoyang was reborn as an ordinary high school senior with the same name and surname, with a net worth of nearly 100 million. He was a regular student with no special talents, except he was granted a “Godly Rich System” that randomly triggered rewards every time he spent money on women.The stepmom accompanying the studies, a saleswoman with a charming figure, the beautiful campus flowers, and her curvaceous and sexually attractive mother. There’s also a married woman on Douyin (TikTok) and a woman on Kuaishou (another Chinese short video app) showing off her figure!This is the story of a young man with an ordinary background who aspires to live a lavish life.While the married women are his true love, Cao Shaoyang occasionally doesn’t mind keeping a few young beauties around to relieve the pressures 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.