Moonbound: The Rogue's Second Chance - Chapter 11 - ELEVEN - SKETCHES

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.

Between heaven and earth lies the greatest truth, and the manifestation of the great truth descends in the form of Gu.　　People cultivate the Qi of heaven and earth around their bodies to control Gu and exert their magical power.　　One year after his transmigration, Chen Qing finally discovered his special features on the day he contracted his first Gu. He was actually able to see through everything about the Gu...　　Therefore, he began to march toward the road to immortality step by step.

Zephany Draven is a shy, clumsy celebrity journalist who is constantly ridiculed for not getting the big scoops. She is soft-spoken and easily intimidated, so she looks weak. However, behind closed doors, she's Eclipse, an altogether tougher, loud-mouthed agent and quite ruthless and efficient.Kendrick Montclair is a gentle, positive artist who loves his family and remains optimistic despite his struggles. His gentle nature makes him easy to take advantage of. But secretly, he's Obscura, a cold, ruthless agent who is efficient and silent.Both work as partners in a secret organization that preserves hidden truths erased by governments, yet they remain completely unaware of each other's true identities.Their goal is to reach the highest level of clearance to access classified information. But just when they're on the verge of success, they fail.Then, a mysterious man appears with an offer—a contract marriage in exchange for the information they desperately seek. Trapped with no alternative, they sign the deal.But neither expected what would happen next.-------------Kendrick and Zephany sat by the glass wall, waiting for their food when a car suddenly crashed through. Kendrick pulled Zephany to safety just in time, but both got small cuts from the broken glass.“Are you okay?” they asked, checking each other.To their astonishment, the cuts healed before their eyes.Their minds raced. “Beside me, the only person I know who has that ability is.”“No! She can't be that loud, short-tempered woman!”“No! He can't be that silent, obnoxious man!”“Did I marry my secret partner in crime?” They both shuddered at the thought.