China: Extension of definitive antidumping duty on imports of dispersion unshifted single-mode optical fiber from the European Union and the United States of America, as well as extension of duty to imports of cut-off shifted single-mode optical fiber from the United States of America following anti-circumvention investigation

In April 2010, the government of China initiated a new antidumping investigation. The antidumping duty imposed in 2012 was extended for a period of five years in April 2017. In April 2022, a sunset review was initiated and the definitive duty was extended for a new period in April 2023. In March 2025, an anti-circumvention investigation on imports from the United States was initiated, and the definitive duty was extended in September 2025 to imports of slightly different goods from the US.