One of Yùzhōu's largest towers is the Heavenly Moon Tower, owned by a group of royals and their sentinels who revere the moon. It's best not to visit them out of nowhere. They're not as kind to strangers as the rest of the fragment.
The Pale Vanguard is a group of highly trained vanguards, all specialized in the paranormal in some way. Some consider themselves masters of the spirits, while others spend their time eradicating the ones that fall out of line.