The Water-and-Fire Blade is the named treasure associated with Chijingzi and entrusted to Yin Hong in Investiture of the Gods. It is a specific Fengshen object, not a generic sword category.
Its relationship has two layers: Chijingzi is the master-side source who transmits the treasure, while Yin Hong is its important bearer and battlefield user.
The Subject therefore connects both figures while preserving the difference between origin or transmission and actual possession or use.
