(Is this the what happened? She failed to overcome the heart’s devil, fell into a berserk and killed her friends. Despair and guilt struck her once she woke up. So she created a second persona and instilled it with different memory and past to escape from reality while the main persona fell into hibernation. ZhuiKong bore the sin to avoid the pain from continuing on the second persona. So that psychopath is actually a good guy? Why do have a feeling that he’s the culprit?)
There was nothing Zheng could do to help YinKong. His only option was to witness what happened at this time that led to the outcome of the future.