How to untie the backpack strap?

How to fasten the strap of the schoolbag;

1. First, pass the belt through the two rings from the top.

2. Pass through the lower ring, pass through the upper ring, and pull down along the original strap, and the strap of the schoolbag will be fastened.

Adjust the strap to a comfortable length, not too long, so that the back of the schoolbag is connected with the back, and the bottom is waist-high. If you have a belt, adjust the length and buckle it, which can transfer more than 60% of the weight to the waist and crotch, and it will be much easier to carry a schoolbag.