三年青春如何挽
[sān nián qīng chūn rú hé wăn]
Translating this into English gives 'How to retain three years of youth?' which suggests nostalgia for youthful days and expresses regret about the irreversibility of time passing. In Chinese net culture, users might adopt this username when they miss past experiences or wish to reminisce their school times with bittersweet memories.