For large backpacks with a volume of more than 50 liters, when placing items, put the heavy objects that are not afraid of bumps on the lower part. After putting them in place, it is best that the backpacks can stand alone. And close to the side of the body, so that the overall center of gravity will not fall back.
There is skill on the shoulders of the backpack. Put the backpack at a certain height, put your shoulders into the shoulder straps, lean forward, and stand on your legs. This is a more convenient way. If there is no place to place, lift the backpack with both hands, place it on one knee, face the strap, control the bag with one hand, turn the shoulder strap quickly with the other hand, make one arm enter the shoulder strap, then the other enter.
After carrying the bag, tighten the belt to make the crotch receive the heaviest force, buckle the chest strap and tighten it so that the backpack does not have a back drop feeling. When walking, pull the shoulder strap with the backpack to adjust Belt, the body leans forward slightly, so that the gravity is actually on the waist and hips when walking, and there is no pressure on the back. In case of unexpected events, the upper limbs can flexibly handle it. When passing through rapids and steep areas without protection, the shoulder strap should be relaxed, and the waist belt and chest strap should be opened so that in case of danger, the bag can be separated as quickly as possible.