Tang Xiu decided to leave after addressing the issue with the Qingyuan Group. The Chinese leaders asked him to come to Mist Source with a clear purpose, that was: solving the problem with the Darkening Virus and to maintain the order and safety of the island's inhabitants.
Of these two problems, Divine Doctor Gui Jianchou was now dealing with one and he did not need to concern about it much. He also had nearly solved the second problem.
The following issue he had to carry out was to maintain order, security, and safety of the Mist Source Island's people, and deal with whoever took advantage to make things more chaotic and fishing in troubled waters. The most important thing he had to do under such a desperate situation was to deal with the criminals causing riots.