Core Viewpoint - The Ministry of Commerce of China has announced a ruling regarding the anti-circumvention investigation of cut-off shifted single-mode optical fibers imported from the United States, determining that such imports circumvent existing anti-dumping measures on non-dispersion shifted single-mode optical fibers [1][4]. Current Anti-Dumping Measures - The Ministry of Commerce imposed anti-dumping duties on non-dispersion shifted single-mode optical fibers from the U.S. starting April 22, 2011, with a five-year duration. This measure was extended in 2017 and again in 2023, with the applicable duty rates adjusted to between 33.3% and 78.2% for U.S. companies [2][3]. Product Description - Non-dispersion shifted single-mode optical fibers, also known as G.652 fibers, operate at wavelengths of 1310nm and 1550nm, with specific attenuation and dispersion characteristics. These fibers are widely used in high-speed, long-distance communications [3]. Anti-Circumvention Measures - The Ministry of Commerce has recommended adjustments to the tax scope, leading to the application of existing anti-dumping tax rates to the cut-off shifted single-mode optical fibers imported from the U.S. starting September 4, 2025 [4][5]. Tax Rates - The anti-dumping tax rates for specific U.S. companies are as follows: Corning Incorporated at 37.9%, OFS Fitel, LLC at 33.3%, and Draka Communications Americas, Inc. at 78.2%. Other U.S. companies will also face a rate of 78.2% [5]. Implementation Period - The anti-circumvention measures will be in effect from September 4, 2025, until April 21, 2028, coinciding with the expiration of the current anti-dumping measures on non-dispersion shifted single-mode optical fibers [6]. Review Process - Stakeholders may submit written applications for a review of the necessity to continue the anti-circumvention measures after a reasonable period during the implementation phase [7]. Legal Recourse - Parties dissatisfied with the anti-circumvention decision may apply for administrative reconsideration or file a lawsuit in court according to the relevant laws [8].