In the event of infringement, although protection can be achieved through prior use of trademarks, well-known trademarks in other countries, etc., warning notices are undoubtedly the most direct and commonly used tool for safeguarding rights. The function of a warning announcement is not only to declare one's own trademark rights, but also to warn others not to use the trademark without authorization, otherwise infringement lawsuits will be filed. The trademark owner is required to regularly publish warning notices, usually once every 1-2 years, to maintain the validity of the trademark and also serve as a basis for future rights protection.