User information synchronization, achieving automatic synchronization of user information related to domain control, office systems, production systems, and production operation and maintenance management systems of the bastion machine system. The User Management Center provides a centralized management platform for bastion machine system user management by connecting with the User Management Center, and hierarchical management of user information is carried out according to the headquarters/branches. User self-service is provided by the bastion system in the form of web application services. Any user who has registered in the user management center can access the user self-service page through a browser. Office portal, the office system is the office portal of Minsheng Bank, which realizes single point login of the office system to the bastion machine system. Other auxiliary functions, including approval process management for bastion machine users, SMS service function, email service function, etc.