发现手机黑屏的自己好漂亮
[fā xiàn shŏu jī hēi píng de zì jĭ hăo piāo liàng]
This nickname conveys that the user feels more attractive when they're not consciously trying to impress others or constantly check their appearance through a device, implying a sense of natural beauty or self-confidence found in unplanned moments.