少年你忘了你的红领巾姑娘你忘了你的大红花
[shăo nián nĭ wàng le nĭ de hóng lĭng jīn gū niáng nĭ wàng le nĭ de dà hóng huā]
'Boy, you forgot your red scarf, girl, you forgot your red flower' is the meaning here. It evokes memories of childhood innocence and nostalgia associated with school days in China, specifically related items that symbolize youth, such as the red scarf worn by young pioneers.