The leader of the Black Wolf Gang not only looted everything ad burned the old man's house, he also threatened the old man that he will snatch the old man's granddaughter and sell her to someone who likes to enjoy little girls.
This completely broke the old man's heart. The old man was left with no choice but to commit suicide. It is because even if he want to run away, he could not run away. The leader of the Black Wolf Gang had put a mark on his granddaughter that could track her no matter where they go.
This story also enraged Ye Xiao completely. He took a deep breath and promised the old man that he will obliterate the entire Black Wolf Gang. They should not worry and return home.
He also gave them enough money to build their house back and live comfortably for a few years.
.....
Ye Xiao soon entered the city and after asking around, he found the location of the Black Wolf Gang.