Literature Reference: After parting in Beijing, I have heard the sound of the washing block in Wu and Chu several times. Source from 'Song Huanqun Fashi'.
听: Perception and discernment. To listen is to hear attentively. — "Shuowen Jiezi"
砧: Chopping block. Anvil.
Meaning: Listening to the sound of the washing block symbolizes tranquility and a steadfast mind.