Zhong Guo Chan Ye Jing Ji Xin Xi Wang·2026-02-12 00:14Core Viewpoint - The South Korean Trade Commission has made a final affirmative ruling on anti-dumping measures against single-mode optical fibers originating from China, recommending a five-year anti-dumping duty of 43.35% on specific Chinese companies and other manufacturers/exporters [1]. Group 1: Anti-Dumping Investigation - On March 7, 2025, South Korea initiated an anti-dumping investigation on single-mode optical fibers from China, with the investigation period set from July 1, 2023, to June 30, 2024, and the damage investigation period from January 1, 2021, to December 31, 2024 [2]. - On September 19, 2025, South Korea's Ministry of Economy and Finance decided to impose a temporary anti-dumping duty on the involved Chinese products for a period of four months [2]. - The temporary anti-dumping duty was extended by two months on December 30, 2025, changing the duration from four months to six months, now set from September 19, 2025, to March 18, 2026 [2]. Group 2: Affected Companies - The companies affected by the anti-dumping duties include Hengtong Optic-Electric Co., Ltd., Yangtze Optical Fibre and Cable Joint Stock Limited Company, and Hangzhou Jinxingtong Optical Fiber Technology Co., Ltd., along with other Chinese manufacturers/exporters [1]. - The products under investigation fall under South Korea's tax code 9001.10.0000, excluding low-loss fiber bundles, cables, and single-mode optical fibers specified as G.652.D primarily used for optical devices [1].