It seems Shu had a play companion when he came to the pools throughout the years. An old pandaren we know as Old Man Liang.
Liang moved away from the main town and stopped practicing in the pools some time ago. I am told he lives in a small house northeast of here, up the hill.
Liang may know what has driven Shu away, and where the spirit might be found.
Go to Liang. Ask of Shu.
Completion
Visitors are rare up here, but you are welcome. It is nice to meet you, young <class>.