NdFeB magnets are objects that can generate magnetic fields, which are magnetic dipoles that can attract ferromagnetic substances such as iron, nickel, cobalt and other metals. The determination of the magnetic pole is to hang a magnet with a thin line, and the magnetic pole pointing to the north of the NdFeB magnet is called the North Pole or N Pole, and the magnetic pole pointing to the south is the Guide or S Pole.