In general, the overall process of making a backpack is like this: material selection  >  preparation > mold >  cutting > picking > printing (embroidery) > sewing > whole package binding > inspection > packaging > storage > delivery.

However, the sewing is divided into: sewing front piece, sewing seam, sewing lining, filling sewing, sewing side pocket, sewing accessories (shoulder belt, pocket). There are some small processes in each process, such as sewing the rear piece and the high-speed sewing package.

There are even special techniques that are not available for every type of backpack: for example, leather, composite, oil edge, as well as glue, rivets,  stamping, spraying, etc.

Therefore, if a real backpack is produced, it needs to go through a good process to get out.