The ID card has a built-in chip with ID number information. When verifying the ID card (swiping the ID card with a card reader), the detailed information of the ID card, including photos and addresses, is displayed on the computer through number comparison. This information is not stored on the ID card, but on the card reader.

Personal information protection law is a legal provision to protect personal information. It involves the establishment of legal name, legislative mode, significance and importance of legislation, legislative position and legislative basis, scope of application of law, application exceptions of laws and regulations, basic principles of personal information processing, relationship with government information disclosure regulations, different supervision methods and their influence on government agencies and other personal information processors, relationship between coordinating personal information protection and promoting free flow of information, application of personal information protection law in specific industries, sensitive personal information issues, law enforcement agencies and industries. It has a great effect on individuals and industries.