Supermarket anti-theft buckle \ The main magnetic stripe of the bookstore applies the principle of electromagnetic induction. The supermarket anti-theft buckle is permanent, and the magnetic stripe in the book needs degaussing before going out.

Put the brick in the white box on the left hand side of the door and knock it three to five times.

Then calmly put the books you want into your schoolbag. (completed in one minute)

Then look at the cashier, take out the prepared screwdriver (flat head) and pry open the cash register.

Take the money and run (within a minute)

Wrap what you want to steal in foil paper of cabbage, which is undetectable.