backpack carrier / bicycle carrier

People who enjoy cycling for a distance may face the problem that a specialized bicycle luggage bag is hard to carry when you have to walk with it, and tying a normal backpack on the bike is so troublesome.
This design is a bicycle carrier with two reverse clips. Cross the backpack straps and clip the right strap to the left clip and the left strap to the right clip, which fastens the backpack on the bicycle easily and it will not fall off at all.
This carrier makes riders never worry about what kind of bag to take with their trip.