A brief introduction to the free version of the group purchasing system: This group purchasing system is a completely free version with no restrictions and no encryption. The source code is officially released. It can freely expand and improve functions. It can be used for learning or commercial purposes without any restrictions. Notes on Yitian Group Buying System: 1. The first product on the homepage is displayed: Check "Recommended" when uploading the product; the last recommended product is displayed on the first page. Display of other products on the homepage: Check "New Products" when uploading products; the total number of products displayed on the homepage is 30 products, and the last products selected as new products will be displayed on the homepage. 2. New products on the shelves in the navigation column: Upload products and select "New Products" and they will be displayed in the "New Products on the Shelves" column; Hot-selling products: Upload products and select "Hot-selling" and they will be displayed in the "Hot-selling products" column; 3. Selecting different categories when uploading products in the group purchasing system's product classification will display the products under their categories; Note: The products are all limited-time specials. When they expire, they will not be displayed on the website and cannot be purchased. Expiration is equivalent to the products being removed from the shelves and will only be displayed in the background. 4. Fix most of the problems reported by everyone 5. Add various third-party code adding boxes (such as: sharing, customer service, etc.)