Whose son is Fang Xiaxin in Big Times 2?

Ding Xie's son, in fact, 1 has laid a lot of foreshadowing: First, Fang Jinxin and Ding Xie were drinking, and Ding Xie got drunk and said, "Your son is my son, my son is your son!" The screenwriter will not bury this foreshadowing for no reason; Second, his character is not like Fang Jinxin at all, but like Ding Xie, selfish, willful, impulsive and unreasonable; Third, Ding Xie repaid the kindness without mercy. Zhanbo Fang's gratitude made Zhou Jisheng Long Chengbang die tragically. This alone must be the kind of Ding Xie!