Business model refers to the combination of a series of transaction structures and operating methods used by enterprises to achieve profit. The common business models were limited companies, joint stock companies, and sole investment companies. The nine main elements of a business model include: 1. product or service: the core of the business model is to provide what kind of products or services, which is the basis of corporate profits. Target market: determining which market the product or service is targeted at and which needs it meets is an important aspect of business model design. 3. Revenue model: determining the source of income of the company, including sales revenue, investment income, advertising revenue, etc. This is the core of the business model. 4. Cost structure: determining the cost structure of a product or service, including raw materials, labor, rent, etc., is an important aspect of a business model. 5. Profit-making model: The core of the business model is to determine the profit methods of the enterprise, including direct sales, indirect sales, renting, advertising and other methods. 6. Marketing channels: determining which channels the company will sell its products or services to, including supermarkets, specialty stores, online shopping malls, etc. This is an important aspect of the business model. 7. Customer relationship: determining the relationship between the enterprise and the customer, including customer satisfaction, loyalty, etc., is an important aspect of the business model. 8. Competition strategy: determine the competitiveness of the company in the market, including price, quality, service and other aspects. This is an important aspect of the business model. 9. exit mechanism: determining the way companies exit the market, including acquisition, listing, bankruptcy, etc. This is an important aspect of the business model.