After defeating Guangzhi and acquiring the Red Tides Transformation, locate the large bell just behind where Guangzhi was initially standing. Interact with it to ring the first of three bells required to unlock a secret area in the Bamboo Grove. (Refer to 'The Three Bells' page for all locations).
Proceed towards the Guanyin Temple. If you skipped the Wandering Wight, run past him through the tunnel. Cross the long wooden scaffolding. You'll encounter a few Wolf enemies, including an archer, guarding the temple entrance. Defeat them and open the gate. Follow the golden trail to the third Shrine and activate it. Before proceeding to the plaza, explore the area: find a small enclosed space near the Shrine with a green wisp (small Will) and Purple Lingzhi. Opposite the large building, through a small arch, find a chest with x2 Tiny Piece of Gold and x2 Stone Spirit. Another building has a Gentian plant and pots for Will.
Ensure you've spent all your Spark Skill points and equipped your best armor. The next area features the final boss of this location, Lingxuzi.