心如薄荷天然绿爱如西瓜天然甜
[xīn rú bó hé tiān rán lǜ ài rú xī guā tiān rán tián]
Expressed as ‘Heart is as fresh as natural mint, Love is as sweet as a watermelon’. It means that this person views the heart and love purely and naturally. They cherish true emotions and believe in pure love without any contamination.