It is called "Warm and lustrous, with a vibration heard far away, breakable but not bent, with a sharpness that does not hurt, like a fine gentleman." It is endowed with rich connotations and emotions.
說它「溫潤以澤，其聲舒揚，不撓而折，銳廉而不忮，類似君子」，對它賦予豐富的聯想與感情。