The greatest usefulness of “One City Card” is convenience and simplicity, which is conducive to optimizing the urban social public service process, realizing the integration and sharing of resources across regions and departments, and promoting the development of urban and rural integrated IC card industry that is closely related to people’s lives. Fully integrate social resources in urban and rural areas such as transportation, finance, commerce, education, social security, health, tourism, and community, improve the overall quality of the city, and promote the digital livable smart city community process system. The deployment of the city card system architecture has a multi-tiered settlement system, clear The data processing flow, system key security mechanism, and the overall deployment of the system are divided into central clearing, unified card handling, key management, and data exchange as "core platform" applications to realize public transportation, rental, health, education, business, and campus The integrated sharing application of sub-central platforms in various industries, such as communities, enterprises, public utilities, etc., provides effective decision support and emergency control for the government, and facilitates smart applications such as hand-held cards for citizens or easy payment in mobile phones.

The system features data integration and sharing management to realize the integration and sharing of information resource data of all operating entities of the city's card. It aims to build a “cloud computing” green data center at the core level of digital cities.

Urban emergency linkage command management realizes the integration and integration of the city's one-card public database and urban transportation, tourism, health,*, community, campus and other levels of emergency system resources, and cooperates with WEB+WAP portal, GIS+GPS positioning, video surveillance, mobile terminal, etc. In a variety of forms, it provides decision-makers with comprehensive services including cross-system and cross-regional urban public emergency response linkage, sudden command, disaster reduction early warning, safety dispatch, and civil defense aid decision-making.

Online charging management implements functions such as online self-service recharge, online lifestyle payment, online shopping, online game recharge, online shopping, citizen card balance and transaction information inquiry.

The key management system adopts a multi-level security management and control framework that meets the relevant standards of the State Bureau of Cryptography, the People's Bank of China, the Ministry of Housing Construction, and the Ministry of Human Resources and Social Security, and implements multi-industry key security management between the city's one-card systems, terminals, and cards.

The fund clearing management implements the clearing and clearing function of city pass-card funds among various business entities such as banks, merchants, operators, transportation, and public utilities in the city's card system, and can be flexibly extended to inter-city clearing applications for inter-city interconnection and intercommunication.

The unified identity authentication provides unified identity management solutions for users of Citylink and branch centers in various industries, and implements security management measures such as rights management, hierarchical authorization, digital certificates, and log auditing, which improves the security and reliability of the system.

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