当红领巾变成领带
[dāng hóng lĭng jīn biàn chéng lĭng dài]
This name conveys a sense of nostalgia and maturation. 'Red Scarf' is something worn by young pioneers (students in elementary school) as a symbol of pride and innocence, while 'necktie' refers to adulthood or professional life. The phrase describes how innocence fades with age.