The mission of "Part Two" is to solve the remaining problems of "Part One", such as:
Will Qi Shaoshang and Gu Xichao reconcile as before and have no grudges?
Will the police give Xiao Gu other tasks that will embarrass him?
Could special fungi cause more harm?
How much does Gaojixue know, and where is it hidden?
Will "Fifth Brother" be pulled out of the police force by Xiao Gu?
How will Golden Scale take revenge on the person who "killed" him once?
Is Shiraishi really in despair?
In the police reshuffle, who will win in the end? Who is the real mastermind?
…
All the answers are in "The Lower Black and White Forest"