While crossing the Jinghe River at night, there was faint movement on the boat...
I came here when I was young and used the Calestial Seize and the Moon to capture the breathing tube on Quanxian's body.
Location
2Across the Water (Part 2)
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Across the Water (Part 2) · Where Winds Meet
Come to the bow of the ship here, talk to Yu Niang, select Ask what is missing, and then give her the breathing tube obtained in the previous step to complete the task.