爱情有柠檬一般酸
[ài qíng yŏu níng méng yī bān suān]
'Love Is As Sour As A Lemon'. It is a vivid metaphor indicating the complexity of love. Although lemons are often used as an analogy for something tart yet refreshing. It conveys that sometimes, love brings discomforting and unpleasant emotions but can still be cherished in a certain way.