少年的泪不及海天蓝海蓝似天我终不是她
[shăo nián de lèi bù jí hăi tiān lán hăi lán sì tiān wŏ zhōng bù shì tā]
Combining 'a youth's tears do not compare to the sea's blue, which resembles the sky, I am ultimately not her' expresses unrequited love or longing, often reflecting on past love or loss.