说明：  南京旅游向导系统是一个实用性很强的服务系统，通过该系统可以帮助用户网上查询南京的一些旅游景点信息、一些旅游线路的信息以及可以查询旅游景点的公交线路。同时，还提供旅游公司管理员和超级管理员的角色，便于系统管理。系统还满足用户快速查询、操作便捷等需求。 三层架构原则：包括用户界面层、业务逻辑层、数据访问层。
(Nanjing tour guide system is a very practical service system, this system can help users on-line query of some tourist attractions in Nanjing of information, some tours can check the information, and tourist attractions of the bus lines. Meanwhile, the company also offers travel managers and super administrator role, to facilitate system management. System also satisfy the users to quickly find, easy operation and so the demand. The principle of three-tier system: including the user interface layer, business logic, data access layer.)