Si Yuchen has his own dilemmas. It's not that he doesn't want to come back and settle things with Gu Xiaonuan, but right now, there are more important matters that require his attention and energy.
Si Yuchen is not a qualified father. He hasn't even had the chance to experience what it feels like to be a father before having cold water thrown on him.
Gu Xiaonuan had a miscarriage, and the child is gone too.
Perhaps before he even had the chance to feel joy, he was plunged into utter despair. This is also a unique kind of experience.
But later, when Si Yuchen learned about Si Lingtian's plans and schemes, he regained hope.
Doesn't this mean he could be like other fathers and watch his and Gu Xiaonuan's child grow up?
From the moment this child was born, he faced countless setbacks and hardships. Even though he's a boy, Si Yuchen can't help but wish for a smoother journey in his life.
Perhaps, this is the only way Si Yuchen, as a father, can make amends to his child.