用三年青春换来一件校服
[yòng sān nián qīng chūn huàn lái yī jiàn xiào fú]
'Trading Three Years of Youth for a School Uniform' can imply the bittersweet nostalgia of exchanging three important youthful years at school for the experience of wearing the uniform. This often reflects on high school memories or cherishing the days when they wore the school outfit, which was a part of their adolescence.