Core Viewpoint - The General Administration of Customs of China has outlined regulations and measures regarding the export declaration of fentanyl-related substances, emphasizing strict control and prevention of smuggling activities [1][2]. Regulatory Framework - Fentanyl-related substances such as alfentanil, fentanyl, sufentanil, and remifentanil are classified as narcotic drugs under the "Directory of Narcotic Drugs" (2013 edition) and are subject to management according to the Narcotic Drugs Management Law of the People's Republic of China [1]. - In 2019, fentanyl-related substances were fully regulated and included in the "Supplementary Directory of Non-Medicinal Narcotic Drugs and Psychotropic Substances," prohibiting any production, sale, transportation, use, storage, and import/export by individuals and organizations [2]. Customs Control Measures - The Customs authority maintains a high-pressure stance against the smuggling of fentanyl-related substances, employing various measures such as risk analysis, targeted inspections, and enhanced use of detection equipment like CT and X-ray machines [2]. - The Customs has optimized and upgraded intelligent imaging algorithms to improve the identification of concealed smuggling activities, ensuring timely human inspections of suspicious goods [2]. Personal Carry Regulations - Individuals carrying narcotic drugs and psychotropic substances for medical treatment must present a medical diagnosis certificate and identification, allowing them to carry a maximum quantity as per a single prescription [3]. - Medical personnel carrying small amounts of narcotic drugs and psychotropic substances for medical needs must hold a certificate issued by provincial-level drug supervision authorities, which Customs will accept for clearance [3].

Core Viewpoint - The article discusses China's regulations and customs measures regarding the export of fentanyl-related substances, emphasizing strict control and management to prevent smuggling and misuse [1][2]. Summary by Sections Regulations on Fentanyl Exports - Fentanyl and its derivatives are classified as narcotic drugs under the "Directory of Narcotic Drugs" (2013 edition) and are subject to strict management according to the "Drug Administration Law of the People's Republic of China" [1]. - Import and export of narcotic drugs require licenses issued by the national drug regulatory authority. Individuals may carry a limited amount of narcotic drugs for personal medical use, provided they have a medical diagnosis and identification [1]. Customs Measures Against Smuggling - In 2019, all fentanyl-related substances were classified under the "Supplementary Directory of Non-Medicinal Narcotic Drugs and Psychotropic Substances," prohibiting production, sale, transportation, and import/export by any entity or individual [2]. - The customs authority employs a comprehensive strategy to combat smuggling, including risk analysis, enhanced inspection efforts, and the use of advanced detection equipment like CT and X-ray machines [2]. - Continuous training for customs officers is emphasized to improve their ability to detect and prevent the smuggling of fentanyl-related substances [2].