我非柠檬为何心酸我是薄荷满是心凉
[wŏ fēi níng méng wéi hé xīn suān wŏ shì bó hé măn shì xīn liáng]
A metaphorical expression combining fruits and herbs: 'If I'm Not a Lemon Why Am I Sour; If I'm Mint Why Is My Heart Chilly?' This portrays feelings of sadness or disappointment with a twist of confusion.