校服是最美的情侣装学校是最棒的婚恋所
[xiào fú shì zuì mĕi de qíng lǚ zhuāng xué xiào shì zuì bàng de hūn liàn suŏ]
'School uniform is the best couple outfit and school is the best place to marry.', which is used humorously, indicating that many people had their first crush or romantic experience at school.