说明：  系统的主要目的是实现汽车租赁管理系统的一些基本功能，包括用户和管理员的登录管理、用户的注册、会员的管理、车辆信息的查询与修改及删除、用户信息的修改及管理、收入及支出的一些订单管理、财务的管理及统计等
(The main goal is to achieve some of the basic functions of car rental management system, including user and administrator login management, user registration, membership management, vehicle information query and modify and delete, modify user information and management, income and expenditure of some order management, financial management and statistics etc.)