Absurd Proposal

However, Jiushu is capable of using the spirit hands. Even so, she was almost crushed by the water pressure by the time she reached near the shard, which was lying under a rock in the bottom of the river. Jiushu extended her hand into the water, and from the tip of her hand a spirit hand sprouted. Even so, it was not enough to reach the rock the shard was under. 

This is already a peak summer month, when the river is flowing at its lowest speed. She will not even be able to sense the shard in any other month. Even Jiushu, who is neither a local, nor someone who studied geography knew as much. This river is that famous.