"Is this the key to open Situ An's door? His own black-and-white memorial photograph?" Seeing the words on the back of the photograph, He Yi calmed down. As Situ An's most "loyal" lackey, he understood the significance of those words.
Once in possession of the photograph, one must comply with the rules written on its back, effectively assuming Situ An's fate and becoming an enemy of the entire reality.
Situ An's inheritance was incredibly tempting, but one must be alive to enjoy it.
Caught between two worlds, one lives every day in trepidation, a single misstep potentially resulting in soul scattering and utter annihilation.
"The person in the photograph was not Situ An before; after he became the new head of the family, he transformed into the core of that home." Jiang Chan seemed to know many secrets; the monsters in the Shadow World seemed to exist based on "families," endowed with a deeper significance.