The Azure of Purity, one of the three Azure Realms in the World Above. The others are Yu Qing and Tai Qing. The Azure Realms are thought to be among the oldest locations in the World Above, seemingly immune to the constant change that marks the rest of the spiritual realms. They are quite difficult to get to, as only the most powerful spirits can find the paths that lead to them.
Shang Qing is the home of the Eternal Library, in which every book that has ever been written or ever will be written is kept. The library is supposedly well guarded, and none return from it without first bringing something of great value to the guardians.