The password of the stored-value card of Northern Bookstore is on the back of the card or on the package. The password of the stored-value card in Northern Bookstore is generally on the back of the card or on the package, and it is generally a password composed of a series of numbers, which is used for identity verification when the stored-value card is recharged or consumed. If you can't find the password, you can try to ask the salesperson for the password when buying the stored-value card, or call the customer service phone of North Book City for consultation.