The sect master and Shui Yuan often teach the disciples, but both have limited energy and can't cover everything. Besides, due to the reason of their cultivation faction, they are completely clueless about the Path of Ghost Cultivation.
Now that Wuchang is here, he is a ready-made top instructor! He does not refuse this matter, and even quite enjoys the contact with the young members of the Righteous Blood Sect. This might be an old man feeling rejuvenated, even though Wuchang doesn't appear aged in his looks, his actual age is indeed not small.
After the celebration banquet, the native land of the Nine Provinces remained peaceful. The Nine Provinces cultivators are now mostly busy digesting the gains from the expedition to the Blood Refinement World, naturally having no mood or time to stir trouble everywhere.
But this does not mean the situation will remain as such in the future.