Core Viewpoint - The Ministry of Commerce of China has announced a decision regarding the anti-circumvention investigation of imported wavelength-shifted single-mode optical fibers originating from the United States, indicating that U.S. exporters have circumvented existing anti-dumping measures through changes in trade practices [4][6]. Summary by Sections Investigation Background - On March 4, 2025, the Ministry of Commerce initiated an anti-circumvention investigation into imported wavelength-shifted single-mode optical fibers from the U.S. at the request of domestic companies, marking China's first anti-circumvention investigation [6]. Findings and Decisions - The investigation revealed that U.S. exporters were circumventing China's anti-dumping measures on non-dispersion-shifted single-mode optical fibers by exporting related wavelength-shifted single-mode optical fibers [4][6]. - As a result, the Ministry of Commerce recommended adjustments to the tax scope to the State Council Tariff Commission, which decided to apply the existing anti-dumping tax rates on non-dispersion-shifted single-mode optical fibers to the related wavelength-shifted single-mode optical fibers starting from September 4, 2025 [4][5]. Anti-Dumping Tax Rates - The anti-dumping tax rates for various 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 tax rate of 78.2% [5].