I am wong shi-tao of the department of creative commons, which uses the two-dimensional access, integrates big data, ai technology, artificial intelligence technology and block-chain data analysis techniques, empowers new retail sales, constructs a new two-dimensional marketing-flow distribution platform, at one end is paid for by advertisers or 4a advertising companies who need to create retail sales, at the other end is free of charge to commercials and users, commercial activities have been cost-effective, market promotion has been achieved, customer visceralization has been enhanced, and traffic dividends have been achieved. We are now seeking out 100 local city partners and sharing the dividends of new retail two-dimensional advertising flows, just like the advertising model in the mass media. We are using 2-dimensional as a medium that can be better understood by interested leaders. Main: retrospective system, 2d tags, product traceability, anti-false traceability, 2d red pack...