Literature Reference: After the game, lamenting the absence of the moon, I lie awake listening to the pestle's sound. Source from 'Xian Zhong Qiu Su' by Yao He.
听: Perception and discernment. To listen is to hear attentively. — "Shuowen Jiezi"
碪: "Anvil," also known as "砧子" in Chinese.
Meaning: Listening to the pestle implies tranquility and a pursuit of inner peace.