[The United States makes a preliminary anti-dumping ruling on China-related polytetramethylene ether glycol] On November 12, according to the China Trade Remedy Information Network, on November 6, the U.S. Department of Commerce issued an announcement on polytetramethylene ether glycol (Polytetramethylene Ether) imported from China, South Korea, Vietnam and Taiwan, China. Glycol) made a preliminary anti-dumping ruling. The preliminary ruling was that the dumping margin of Chinese manufacturers/exporters was 213.44%, that of Korean manufacturers/exporters was 25.32%-49.79%, that of Vietnamese manufacturers/exporters was 36.55%, and that of manufacturers/exporters in Taiwan, China was 7.46%-26.42%. The U.S. Department of Commerce is expected to make final anti-dumping rulings on the products involved in China on January 18, 2027, and on March 29, 2027, on the products involved in South Korea, Vietnam and Taiwan, China. This case mainly involves products under US Customs Code 3907.29.0000. On April 30, 2026, the U.S. Department of Commerce launched an anti-dumping investigation into polytetramethylene ether glycol imported from China, South Korea, Vietnam, and Taiwan.