The child is carrying a backpack. The backpack puts a lot of pressure on the shoulders. Analyze it. Where does the pressure come from? The key lies in the weight of the schoolbag.

In fact, the Ministry of Education has regulations. The weight of students' schoolbags. Can't exceed the student's weight110. Of course. Generally speaking, the student's weight refers to the average weight. In other words, a child weighing 50 kilograms. His schoolbag can't weigh more than five kilograms. But this is often not the case. I did a simple spot check. Children in grade 23. Ten years old. It weighs about 30 kilograms. But their schoolbags will never be less than three kilograms. What is the reason? There are too many things to pack. I carefully observed their schoolbags. Except textbooks and exercise books. There are many things. For example. Physical education class's equipment-rope. Colored clay for handicraft class. Even eat lunch bags.

As parents. I dare not challenge the school. Otherwise, children will have no books to read. My solution is to go to school. My colleague bought them a trolley.