可惜浅笑
[kĕ xī qiăn xiào]
'可惜浅笑' combines the idea of a faint smile ('浅笑'), which could be bittersweet or melancholic, often expressing feelings of regret or resignation. The word '可惜' adds an undertone that something precious was missed or not appreciated fully, making it evoke nostalgia and a touch of sadness.