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Go Down the Shaft: After defeating the Mistress of the Night - Huang Yan, obtain the Bloodied Paper and unlock the Shaft Shrine. Speak with Fang Yao to accept her quest. Find a hidden area past the Pendulum Hammer bridge to access rare materials like Bamboo Shoot and Used Mortar, and the Brilliant Red Feather. Return to the Pendulum Hammer bridge, proceed through the tunnel with falling boulders, and drop down at the end to find a hidden room with a Lost Remains, unlocking the Bride Boudoir's Shrine early. Smash vases near a fireplace to find a Mimic Vase and another Brilliant Red Feather. Progress past Spike Traps to reach the Mad Doctor's Lair, collecting the Wei - Poise Force Benediction from a chest.

Traverse Through the Mad Doctors' Lair: Eliminate the mad doctors, watching for their slam attacks and poisonous jars. Activate the first lever to open a path. Activate the second lever to open an adjacent door. Head down to the first room to collect the Mad Doctor's Research Notes, which can be shown to He Youzai and Xuanyangzi. Continue through a broken jail cell.