A Spatial Ring requires a drop of blood for recognition of its owner in order to control the space inside it and store items.
Generally, once a Spatial Ring has recognized its master, it is completely impossible for anyone else to open it unless the owner voluntarily revokes the blood bond or dies.
Yet right now, the Spatial Ring in Duan Lingtian's hand—which originally belonged to Xu Jing, the Young Lord of the Soaring Sky Mansion—simply would not open.
Chapter 1697