MTL - Rebirth of Wild Fire - Chapter 56 Guessing about Lu Yang

When Su Jiu dies on her eighteenth birthday, she transmigrates into a novel about painful love and becomes an adorable four-year-old child.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

Criminal Psychologist, Su Xiao Pei, who was an leftover woman in her modern life, was informed by the God Of Marriage, Yue Lao, that her destined lover was in a car accident, his soul was sent to another world. Su Xiao Pei was ordered to bring back this strange man who was connected to her by the red string of fate. Otherwise, she will live the rest of her life in loneliness, with no one to support her.
But how does that man look? No idea.
What’s his personality like? No idea.
What does he do for a living? No idea.
Can she not go? Of course not.
Su Xiaopei, who believes in all things logical has run up against a serious wall this time.
The bottom line: This is a story about a modern female psychologist who has traveled back in time and an adorable warrior as they talk about love and solve crimes.

- Description from Novelupdates

This is the 40,000th year of the Empire's dominance over the Galaxy. The glory of the Great Expedition has long been buried in the dust of history. Su Yu has transmigrated here, opening his eyes to the ruins of a planet in front of him, utterly bewildered.On this planet, there are war machines that stretch for thousands of kilometers, now broken to the extreme, alien beasts whose roars can shatter mountains and rivers, and radiation alien beasts whose mere movement causes further destruction to the surrounding environment—There is everything here, except hope.Whether willingly or not, Su Yu struggled to survive for three years and finally inevitably contracted radiation sickness, seemingly about to become one of the despairing.Until his Profession Panel, capable of infinite job transfers, finally activated.“Ding!”“Detected that the host has met the prerequisites; do you want to take the profession of [Mechanic]?”“Completing this job will allow you to gain profession experience through daily maintenance, recovery, and assembly of mechanical creations, leveling up the profession, and with each upgrade, you receive an enhancement amplification of your physical attributes...”Looking at the pile of broken gun parts in his repair room, an unprecedented light lit up in Su Yu's eyes!Years later, at the core of the Empire, at the highest point of the Terra world, Su Yu, the Mechanic from Ruins Star, Ghost Shadow Blade of Dead Silence Wilderness, Initiator of the Giant God Soldier Project's Restart, Governor of the Shattered Star Region, Master of Mechanical Ascension, Supreme Throne of the Forging World, looked at the torrent of steel gathering below and commanded with a wave of his hand![Our goal is to make the (second) (crossed out) Empire great again!]