Seeing Donghuang Taiyi and that fragment of the Chaos Bell in the image, Yu Yuan immediately realized something.
Perhaps it wasn't Chang Xi Fairy who left behind the Jade Pestle, or maybe the Jade Pestle she left was switched. In any case, the Jade Pestle is actually the handiwork of Donghuang Taiyi!
It is a tool he used to transmit a message!
Chang Xi Fairy might have discovered the trickery within, so she left a message inside, "Do not come to rescue me," as a reminder to Yu Yuan.
It can be said that all of this was orchestrated by Donghuang Taiyi from the shadows.
His goal is simple: to use Chang Xi Fairy to lure Yu Yuan into attempting a rescue.
After all, in their understanding, Yu Yuan is the only person who can disturb the stability of time and space and still remain unscathed under the Heavenly Punishment Divine Thunders.
With Yu Yuan's help, they could return directly to the normal timeline from the ancient past.