Usage note
书包是小学生每天上学用来装书本和文具的袋子,通常背在背上。
shū bāo shì xiǎo xué shēng měi tiān shàng xué yòng lái zhuāng shū běn hé wén jù de dài zi, tōng cháng bēi zài bèi shàng.
This word refers to the bag that primary school students carry on their backs every day to hold books and stationery for school.