Xu Jin was born in Henan in 1992. In 1993, he had a high fever of 39 and a half degrees while taking a bath. In 1995, he almost died after choking on fruit. In 1999, he went to elementary school. In 2004, he became the boss of a group of brats. In 2007, he met Fang Jian. After Fang Jian ran away from home, he was 20 years old in 2012 and had nothing left. He bought a birthday cake for himself, wore the half-sleeved shirt that Fang Jian bought him for the first time, and jumped into the Bohai Bay on an afternoon when the sun could blind people.