The structure of the schoolbag should be larger so that a large book or stationery can be put in it. For those students who have to bring a lot of books and stationery to school, the schoolbag is very useful. School bags need to be durable and able to withstand the heavy loads that students often carry on their shoulders using the triangular structure of the book. The most important thing is that the shoulder straps of schoolbags should have enough cushioning and good mechanical design to make the shoulder straps comfortable enough, which is conducive to the comfort and health of students.