长发及腰只是一个美好的想
[zhăng fā jí yāo zhĭ shì yī gè mĕi hăo de xiăng]
The desire for long hair reaching the waist signifies a longing or fantasy of femininity and grace. It represents an unfulfilled but beautiful aspiration, where having such hair can symbolize maturity, beauty, or a dream of becoming someone more.