MTL - The Troubleshooting Diary at Hogwarts - Chapter 48 Snow on January 15th (middle)

A premeditated car accident almost cost Lu Jinghan his life, but fortunately, Doctor Han saved him.Later, the old master of the Lu Family said with delight, “The life-saving grace of Doctor Han cannot be thanked with words; it's better to let my grandson offer himself in gratitude.”“Old man, that's enough.” A deep voice came from behind, belonging to Lu Jinghan.Han Xi also felt as if she had been struck by lightning. She's a doctor; healing and saving people is her duty and doesn't deserve such... generous reward....Later, Doctor Han became the person Mr. Lu cherished in his heart.Mr. Lu had a smile on his lips, a smile as sweet as nectar: “Let's have a child, then we'll be a family of three.”“Two, I want both a boy and a girl.”“No, just one.”“Why?”Mr. Lu gazed lovingly at his Mrs. Lu: “It's too painful to have a child, one is enough.”What to do, it seems Doctor Han wants to pounce on her Mr. Lu right now.

The fiancée has betrayed, but how could she know that the man she looked down upon was in fact a prodigy with healing and martial prowess!

His mother kidnapped by the Ice God Pagoda at a young age, Nian Bing grew up travelling with his father, avoiding pursuit. One fateful day, he was forever separated from both his parents and inherited two immortal treasures from them, the Ice and Snow Goddess’ Stone and the Flame God’s stone, allowing him to use ice and fire magic in harmony, a feat unheard of. Taken in by a former chef of legends, once known as the Demon Chef, he creates legendary cuisine while walking the path of vengeance!

- Description from Novelupdates

In this world, orphans or just anyone without any hope for this world can apply to become a “walking target”. Their sole purpose is to be a practicing dummy for the students of the sect who train to become “Demon Hunters”. These students need “walking targets” to test their training on living, walking beings of flesh and blood.
In exchange, they will be provided with food & shelter.
Their existence value is lower than a slave, but if they manage to survive a few years they can receive a life long pension.

Xiao Han is such a “walking target”. One time he witnessed a powerful Demon Hunter disposing a demon. When the demon died, a fragment of the demon that managed to escape entered Xiao Han’s heart. No one saw that, and even Xiao Han himself only felt some discomfort for an instant.

But that thing in his heart soon gave Xiao Han visions, and the first one is of a cultivation method which allows Xiao Han to absorb damage to enhance his body. A perfect cultivation method for a “walking target”.

- Description from Novelupdates