4. Private websites are websites established by individuals or established via social networks to provide and exchange information of their own, not representing other organizations and individuals, and do not provide aggregated information. 5. Specialized websites are websites of agencies, organizations and enterprises that provide applications for telecommunications, information technology, radio and television, commerce, finance, banking, culture, health care, education and other specialized fields, and do not post aggregated information. Article 21. Management, provision and use of online information 1. The management, provision and use of online information in the form of online newspapers, electronic publications and online advertisements must comply with the laws on press, publication and advertising. 2. The management, provision and use of online information in the form of social networks and aggregated information websites must comply with Section 2, Chapter III and relevant provisions of this Decree. 3. The management, provision and use of information content services on mobile telecommunications networks must comply with Section 3, Chapter III and relevant provisions in this Decree. 4. The management, provision and use of information content on specialized websites must comply with specialized laws and relevant provisions of this Decree. 5. Organizations and individuals shall take responsibility for the information they store, transmit, provide or spread online. 6. Private information of organizations and individuals must be kept confidential in accordance with law. The control of private information online is carried out by competent state management agencies in accordance with law. 7. Organizations and enterprises that provide online services may not reveal personal information of service users, except in the following cases: a/ The users agree to provide information; b/ Organizations and enterprises reach written agreements on the provision of personal information to calculate charges, make invoices and documents, and prevent shirking of contractual obligations; c/ At the request of competent state management agencies as prescribed by law.