Core Viewpoint - The approval of "Xuan Yan" as a geographical indication product by the National Intellectual Property Administration signifies a significant recognition of its unique quality and cultural value, enhancing the intellectual property protection framework in Xuancheng City [1] Group 1: Geographical Indication Approval - "Xuan Yan" has been officially recognized as a geographical indication product, completing the geographical indication recognition for all four treasures of the study (Xuan paper, Xuan brush, Xuan ink, and Xuan Yan) in Xuancheng City [1] - This recognition reflects the effectiveness of the city's comprehensive intellectual property protection efforts and aims to promote more "Xuancheng landmarks" to a global audience [1] Group 2: Cultural and Historical Significance - "Xuan Yan," also known as "Xuanzhou stone inkstone," is a renowned product among the four treasures of the study [1] - The rediscovery of the Xuan Yan production technique in 2012 and the designation of Jingde County as "Hometown of Xuan Yan" in 2014 highlight the cultural revival and historical significance of this traditional craft [1]