Literature Reference: The four strings speak a thousand times, one melody carries myriad emotions. Source from 'Listening to the Pipa Player Pluck Lülüe'.
四: Numbers and numerals.
弦: Bowstrings and lute strings, symbolizing artistic talent and the ability to eloquently express emotions.
Meaning: The four strings symbolize the depth of music and the multifaceted expression of emotions, embodying profound sentiments and artistic realms.