Fill in the application form, pay the membership fee, and promise to buy more than 100 yuan in one year. Generally, you only charge a few yuan for the work, just fill in the reader information. It is best to have an ID card, so that you can contact by phone. Card number, one card number, no effect. Therefore, if the name is heavy, the serial number will not be repeated. It's okay. The membership card can be upgraded according to the book code, and the discount will be larger accordingly.