Core Viewpoint - China has implemented anti-circumvention measures on imported optical fiber products originating from the United States, effective from September 4, 2025, following an investigation initiated by domestic companies [1] Group 1: Investigation and Measures - The Ministry of Commerce of China announced the initiation of an anti-circumvention investigation into the import of specific single-mode optical fibers from the U.S. due to potential circumvention of existing anti-dumping measures [1] - This case marks the first anti-circumvention investigation conducted by China [1] - The investigation revealed that U.S. optical fiber manufacturers and exporters altered trade practices to export specific single-mode optical fibers to China, undermining the effectiveness of current anti-dumping measures [1] Group 2: Implementation and Transparency - The Ministry of Commerce stated that the investigation process was conducted in a transparent manner, ensuring the rights of all stakeholders were protected [1] - Based on the investigation results, anti-circumvention measures will be implemented starting September 4, 2025 [1]

Group 1 - The General Administration of Customs announced that the Ministry of Commerce has issued Announcement No. 48 of 2025, which will implement anti-circumvention measures on imports of certain single-mode optical fibers originating from the United States starting from September 4, 2025 [1] - The current anti-dumping tax rate applicable to non-dispersion shifted single-mode optical fibers from the United States will also apply to the relevant cutoff wavelength single-mode optical fibers [1] - Importers or their agents must declare the relevant cutoff wavelength single-mode optical fibers under the specified commodity code 90011000, with the specific code 90011000.01 for declaration purposes [1]

Trade Measures - China's Ministry of Commerce found US exporters circumvented anti-dumping measures on US non-dispersion-shifted single-mode optical fiber by exporting related cut-off wavelength shifted single-mode optical fiber to China [1] - Anti-circumvention measures will be implemented starting September 4, 2025 [1]