How to distinguish between left and right for military canteens and shoulder bags?

Left shoulder bag, right canteen. Generally speaking, daily necessities are carried on the right shoulder and left side, including canteens and shoulder bags, and combat supplies are carried on the left shoulder and right side, including pistols and grenades. When a military canteen is carried alone, it can be carried on the left shoulder and right side, or on the left side of the body, the left shoulder, or the right shoulder. The only thing that cannot be carried around the neck is hanging around.
When lightly equipped, generally, when carrying a shoulder bag, it is carried on the right shoulder and left side. If it is fully equipped, the shoulder bag and canteen are both carried on the right shoulder and left side. In the event of an emergency assembly, put on clothes, pack a backpack, take a shoulder bag, bring toiletries, and bring a canteen filled with water. You must put yourself and your shoulder bag and other equipment into combat status within three minutes.