When using unauthorized well-known brands for marketing, although it is not recommended to do so because it may involve trademark infringement and legal liability, if you still want to reduce the risk of legal sanctions, you can consider the following points: 1. **Do not use trademarks directly**: Avoid directly using trademarks, logos or other recognizable signs of well-known brands. 2. **Blurring**: If you need to mention a certain brand, you can use a vague method, such as using "a well-known brand" or "a certain brand" instead of directly using the trademark name. 3. **Fair use principle**: Research the law on "fair use" and use it for commentary, news reports, research, etc., which may be legal in some cases. 4. **Ensure that the consumer is not misled**: Ensure that the marketing method does not mislead consumers into thinking that your product is associated with or certified by the brand. 5. **Get legal advice**: Consult a professional lawyer to obtain legal advice on the use of well-known brands and ensure that relevant laws and regulations are followed. 6. **Use alternative brands**: Create your own brand or use some unprotected names to avoid the risk of infringement. 7. **Conduct market research**: Understand the legal environment and consumer perceptions of the target market to ensure that marketing activities do not cause legal problems. 8. **Monitor legal developments**: Keep an eye on the latest developments in intellectual property laws and adjust marketing strategies in a timely manner. Please note that any marketing activities involving unauthorized use of well-known brands have potential legal risks. The above suggestions cannot completely eliminate the risks. The best practice is to conduct brand marketing legally and in compliance with regulations.