少女未寒心亦冷少年未爱亦相知
[shăo nǚ wèi hán xīn yì lĕng shăo nián wèi ài yì xiāng zhī]
Combining youth themes, this complex phrase means 'Though the girl hasn't felt the winter's chill her heart grows cold; though the boy doesn't fall in love he gains mutual understanding'. It illustrates youthful detachment and early maturity.