别等错过才懂得珍惜
[bié dĕng cuò guò cái dŏng dé zhēn xī]
This username translates to 'Do not wait until you lose it to cherish it.' It implies that people should appreciate what they have before it's too late, often relating to relationships or opportunities. The user may want to express that they have learned this from their experience and want to treasure the moment.