The following are some possible small businesses and business opportunities that can be considered in 2122:

1. Green product sales: As people's demand for environmental protection and sustainability increases, there may be great business opportunities to sell green products (such as organic food, environmentally friendly household items, etc.).

2. Online education and training: As more people choose online learning and training, providing online education and training services may become a hot small business.

3. Digital marketing and social media management: As enterprises increasingly rely on digital marketing and social media management to promote products and services, the opportunities to provide these services will also increase.

4. Home care services: With the aging and demographic changes, providing home care services (such as companion care, domestic service, etc.) may become a promising small business.

5. Market research and data analysis: As enterprises pay more and more attention to market research and data analysis, the opportunities to provide these services will gradually increase.

6. Cross-border e-commerce purchasing service: With the development of cross-border e-commerce, the opportunities to provide purchasing and transshipment services may increase.

7. Online * * * economic platform: By establishing online * * * economic platform (such as * * * parking space, * * * renting house, etc.), providing specific community services may become a promising small business.