Backpack and backpack connecting components

A backpack and a seat post of a bicycle, comprising:

• a) a backpack body;
• b) connecting component A positioned on a left side of the backpack body and detachably connected to component a on the left side of a bicycle seat;
• c) connecting component B positioned on a right side of the backpack body and detachably connected to component b on the right side of the bicycle seat;
• d) connecting component C positioned at a bottom of the backpack body, and detachably connected to component c on the seat post;
• e) a base fixed at the bottom of the backpack body, with a mounting slot that is opened on the base, with one end facing the bicycle seat post open, and utilized for accommodating connecting component C, and
• connections between the connecting component A and component a, the connecting component B and component b, and the connecting component C and component c collectively form a support structure of the backpack body, while the connection between the connecting component C and the component c creates spacing between the backpack body and the bicycle seat post.