Literature Reference: 玉柱调须品，朱弦染要深。—— 《偶于维扬牛相公处觅得筝筝未到先寄诗来走笔戏荅》 The jade pillar must be tuned with care, and the red strings should be dyed deeply. Source from 'A Playful Reply to Niu Gong' by Bai Juyi.
弦: Bowstrings and lute strings, symbolizing artistic talent and the ability to eloquently express emotions.
深: Profound and enlightened, symbolizing depth of understanding and intelligent wisdom.
Meaning: The deep dyeing of the red strings symbolizes profound meaning and exceptional skill.