Literature Reference: The serene and profound virtue of the qin is unfathomable. Source from 'Qin Fu'.
愔: Yinyin, serene and composed, often refers to a person who is tranquil, gentle, and steady. It is conducive to providing support in one's career endeavors.
Meaning: The character '愔' signifies tranquility, serenity, and depth, often used to describe the harmony and subtlety of qin music.