再甜也是苦再爱也是伤
[zài tián yĕ shì kŭ zài ài yĕ shì shāng]
'No Matter How Sweet, Still Bitter; No Matter How Deeply Love Is Felt, It Still Hurts'. There is a bittersweet irony expressed through these words suggesting that love is both pleasurable and painfull, emphasizing the emotional highs and lows encountered when experiencing deep feelings of love, which can also imply unrequited love.