(Through the login page, the administrator enters the account and password to log in to the system and then manages each module (1) County and city information management: to add, modify and query the county and city information! (2) Urban information management: to add, modify and query urban information! (3) Product category information management: add, modify and query product category information! (4) Product information management: add, modify and query product information! (5) Sales personnel information management: add, modify and query sales personnel information! (6) Sales information management: add, modify and query sales information! After the sales personnel enter their mobile phone number and password, they can perform the following management<imgsrc="sad. gif" smilieid="2" border="0" alt=""/>1) Sales information registration: register their own product sales information (2) Sales information query: query their own sales information)