闺蜜我们一生一起走姐妹我们一世一起过
[guī mì wŏ men yī shēng yī qĭ zŏu jiĕ mèi wŏ men yī shì yī qĭ guò]
This refers to 'We best friends shall stay together whole life; sisters stay together for the rest of our lives'. It expresses deep bond, friendship, loyalty between friends, especially close girlfriends or female relatives.