Shang wasn't quite sure why there was a fountain of blood in the middle of the hall, but his question got answered rather quickly as letters appeared in the air.
"Put a drop of your blood in the fountain."
Shang walked over to the fountain and cut his finger.
A small stream of blood flowed down Shang's finger since he wasn't really careful with the depth of the cut.
As the first drops of blood hit the fountain, one of the doors at the edges of the hall opened, and Shang walked through.
The door closed behind him, and Shang's Spirit Sense could no longer see the fountain.
Shang found himself in an old hallway, but he didn't really care about it a whole lot as he just continued walking.
Shang walked slightly downward for several minutes. He wasn't moving at his top speed, but he was still moving at quite a brisk pace.