The Chinese word for school bag is
书包

shū bāo

Chinese Definition

Components
书
1. Simplified form of 書
包
1. to wrap up; to enwrap; to bundle up
2. to include; to encompass
3. to cover; to place under cover
4. to assure; to ensure; to guarantee
包你滿意 - You're guaranteed to be pleased -
5. to reserve or dedicate for a specific purpose
6. to make a wrapped item
包餃子zi - to make dumplings -
包雲吞 - to make wontons -
包粽 - to make zongzi -
7. to surround
8. (Malaysia, Singapore, slang) Short for 打包, to take away (food)
9. bundle; bunch
10. parcel; package
11. (software) package
包管理器 - package manager
12. bag; sack
書包 - schoolbag; backpack
13. bump; swelling
14. yurt
15. (food) baozi
叉燒包 - char siu bao
小籠包 - xiaolongbao
16. (food) bun; bread (any small baked good)
(Alternative form 飽)
麵包 - bread
漢堡包 - hamburger
一包薯片 - a bag of potato chips
包拯 - Bao Zheng (Chinese politician during the Song dynasty)
17. Only used in 包來