薄荷凉城伴我终老柠檬酸海囚我终生
[bó hé liáng chéng bàn wŏ zhōng lăo níng méng suān hăi qiú wŏ zhōng shēng]
A poetic expression comparing oneself to a city of mint ('coolness') and a sea of lemon ('sour'), indicating that certain emotions (cool/calm or sour/sad) would accompany them forever.