你已丢了幼时模样
[nĭ yĭ diū le yòu shí mó yàng]
This username translates to 'You Have Lost Your Youthful Appearance,' evoking the theme of change over time. It might reflect feelings of nostalgia, regret or bittersweet remembrance of youthful innocence, beauty, and naivety, which can be poignant as one grows older and experiences changes in appearance and demeanor.