On November 30, the Ministry of Commerce issued Announcement No. 77 of 2025, announcing the launch of an end-of-term review investigation into the anti-dumping measures applicable to imported polyphenylene sulfide originating in Japan, the United States, South Korea and Malaysia.

According to the provisions of Article 48 of the "Anti-dumping Regulations of the People's Republic of China", the Ministry of Commerce has decided to conduct an expiry review investigation of the anti-dumping measures applicable to imported polyphenylene sulfide originating in Japan, the United States, South Korea and Malaysia from December 1, 2025. Based on the recommendations of the Ministry of Commerce, the Customs Tariff Commission of the State Council decided that during the expiry review investigation of anti-dumping measures, anti-dumping duties will continue to be levied on imported polyphenylene sulfide originating in Japan, the United States, South Korea and Malaysia in accordance with the tax scope and tax rates announced in Ministry of Commerce Announcement No. 53 of 2020, Announcement No. 34 of 2021 and Announcement No. 26 of 2022.

The anti-dumping duty rates levied on each company are as follows.

Japanese companies: Toray Industries, Inc. 26.9%, DIC Corporation 27.3%, POLYPLASTICS CO., LTD. 25.2%, Tosoh Corporation 25.6%, IDEMITSU FINE COMPOSITES CO., LTD.) 33.6%, Sumitomo Bakelite Co., Ltd. (Sumitomo Bakelite Co., Ltd.) 34.5%, other Japanese companies 69.1%;

US companies: Solvay Specialty Polymers USA, LLC 214.1%, Fortron Industries LLC) 220.9%, other U.S. companies 220.9%;

Korean companies: Toray Advanced Materials Korea Inc. 26.4%, HDC POLYALL Co., Ltd. 32.7%, other Korean companies 46.8%;

Malaysian companies: Polyplastics Asia Pacific Sdn. Bhd.) 23.3%, DIC Compounds (Malaysia) Sdn. Bhd.) 40.5% and other Malaysian companies 40.5%.

The dumping investigation period for this review is from July 1, 2024 to June 30, 2025, and the industrial injury investigation period is from January 1, 2021 to June 30, 2025.