As simple as life starts out, two Erudite members met, fell in love, and had a baby boy. They named this boy Lin Huojin. They intended to raise this boy to be wise and intelligent. As Huojin was growing up, his mother fell into a terrible sickness, his father wasn't the best parent either, occasionally taking his frustration out on his son, leaving his son terrified of the man who he calls his "father".
While his mother was still alive, she taught Huojin 2 languages, Mandarin and English, saying she wanted her son to know more languages than just one, and Mandarin was a starting point. But sadly, just as Huojin wanted to learn more languages, his mother passes away, leaving him alone with his father. Day and night, his father blamed him for his mother's death, spitting insults at him and often wanted to beat him. Huojin had no choice but to keep away from his father at all times and the only way he can think of for winning his father's approval was to engross in his studies, but he knew better than that.
Throughout Huojin's life, he became colder and colder to a point where he's vile, all because of his father. He bottled up emotions, spent more time studying than he'd like to, and wanting nothing more than to escape his home. He'd constantly have fights with his father that went from verbal to physical. Huojin's father was afraid of his son outsmarting and outwitting him, and since he's Dauntless born - something Huojin didn't know - he knew his son doesn't know about fighting as he did, so he fought physically. No matter how many time Huojin fought back, his father would win, leaving him bruised. The only time that his father ever cared about him was when he got him glasses so he could see better.
As time soon went on, the more Huojin thought about what faction he wanted to go. It didn't exactly matter to him, but Dauntless was the one he thought was best for him. Once becoming 17, he intended to take the Aptitude test, intending to get into Dauntless, and change his name, no longer being Lin Huojin, but Elliot Lin.