Before Pei Ye knew who was living in the west compound of the Martial Arts Hall, every morning and evening when the young man came and went from the hall, the same sound would always come from within the compound walls.
Now Pei Ye knew.
The girl could not control the force within the sword, the two tendencies twisting against each other, causing the sword to slip away and fly off.
Each "clang" was actually an attempt just like his current one.
She was practicing the last three moves of Yellow Jade.
Just like the sparrow he now held in his hand.
The sword creator did not have a scripture for Yellow Jade, and so he had to imagine a seemingly soulless sword form as the Sparrow Part. When the sword practitioner perceives the correct direction with a high enough state of understanding and tries to correct it, the "clang" is an affirmation for the practitioner.