The following content is only used to illustrate the bad, illegal or unethical behavior that may exist in the market, and does not constitute any suggestion to implement, support or promote such behavior. In many countries and regions, the above-mentioned behavior may violate laws, platform regulations and ethical standards, and companies should follow the principles of legal and fair competition. The following are just some of the methods that have been mentioned in information reports and public opinion research. The purpose is to help recognize risks and prevent such behavior, rather than encourage their use: 1. Organizing "water army" or fake accounts to post negative reviews • Use a large number of fake identities (robot accounts or paid water army) to post negative reviews on evaluation platforms and social media. • Use pre-written template comments and post them repeatedly to create a broad consensus. 2. Overall "negative marketing" or "bad review bombing" • Coordinate network users (sometimes through online forums, communities or black market platforms) to organize and post consistent negative reviews to create public opinion pressure. • Deliberately create hot topics to guide public opinion to focus on the "defects" of competitors' products. 3. Use social media and search engine optimization (SEO) to maliciously interfere • Purposefully push content with mainly negative information in search results, resulting in a large number of unfavorable reports when searching. • Publishing or spreading negative news and unverified information, and using SEO techniques to increase the visibility of such content. 4. Manipulating user feedback mechanisms • Using loopholes or manual operations to make the evaluation platform algorithm misjudge that a product has a large number of negative reviews, thereby affecting search rankings and recommendation logic. • Encouraging involuntary users (for example, through fraudulent rewards or misleading) to make negative reviews. 5. Spreading false facts and malicious rumors • Spreading unverified and false information on blogs, forums and social platforms to discredit competitors' products or services. • Using fake expert reviews, user testimonials and other methods to increase the credibility of information. It is important to emphasize again that the above methods are not only unethical, but may also constitute illegal acts in many jurisdictions. Fair competition between companies should be based on the advantages, innovation and honest operation of products and services themselves; using malicious network strategies to interfere in the market will not only harm the interests of others in the short term, but also have a long-term negative impact on the reputation of itself and the industry. Understanding and identifying such behaviors will help companies and platforms build a more sound supervision and prevention mechanism to maintain network credibility and market order.