从青涩礼服到纯白婚纱
[cóng qīng sè lĭ fú dào chún bái hūn shā]
It indicates a girl's growing process in terms of love or marriage: transitioning from an inexperienced state symbolized by a formal dress to maturity and purity as represented by the white wedding dress. This suggests maturing from adolescence to becoming ready for marriage.