少女的马尾辫少年的旧拖鞋
[shăo nǚ de mă wĕi biàn shăo nián de jiù tuō xié]
This implies a simple yet nostalgic image where a young girl's ponytail contrasts with a young boy's old slippers, symbolizing innocence and the bittersweet moments of youth, highlighting memories that linger in our hearts forever.