The BAC (Blockchain Business Alliance) aims to build a public chain ecosystem based on the commercial circulation sector. Various platforms, including investment banks, internet companies, real estate firms, hotels, and social media platforms, participate in project research. Together, they drive the digital development of the supply side in retail backend operations and enhance the digital capabilities of supply chains. The BAC public chain provides individuals and organizations with a credible self-financial infrastructure, enabling various assets and certificates to be freely generated, circulated, notarized, and authenticated as tokens on the public chain. This creates a new distribution relationship where value returns to its creators, realizing the token ideal of "co-build, co-share, co-govern."