China’s State Council Tariff Commission, based on the Ministry of Commerce’s (MOFC) recommendation, has decided to extend the imposition of antidumping duties on imported solar-grade polysilicon from the U.S. and South Korea for five years from January 14, 2026.

In January last year, China had said it would initiate a sunset review investigation into antidumping duties on solar-grade polysilicon imports from the U.S. and South Korea, starting on January 14, 2025.

MOFC stated it investigated whether the termination of antidumping duties on imports of solar-grade polysilicon from the U.S. and South Korea would result in dumping of this material into China. It also claimed to have investigated the possibility of continued injury to the Chinese solar-grade polysilicon industry if the duties were removed.

The Ministry investigated multiple components, including rod-shaped, block-shaped, and granular polycrystalline silicon products, manufactured using chlorosilane as a raw material and processes such as the (modified) Siemens and the silane process. It also reviewed directionally solidified polycrystalline silicon ingots, which are a critical raw material for manufacturing crystalline silicon photovoltaic cells.

After the investigation, it found that terminating the duties could result in recurring polysilicon dumping from the U.S. and South Korea, as well as the recurring damage to China’s solar-grade polysilicon industry.

Components from the following U.S. and South Korean companies will attract the anti-dumping duties:

Importers of solar-grade polysilicon originating from the U.S. and South Korea must now pay the corresponding anti-dumping duties to China’s customs.

MOFC said these duties will be levied based on the value of imported goods.

Entities dissatisfied with the ruling can apply for administrative reconsideration or file a lawsuit with the People’s Court under Article 53  of China’s Anti-dumping Regulations.

Recently, MOFC and China’s State Taxation Administration announced that the country will cancel value-added tax export rebates for photovoltaic and other related products from April 1, 2026.

In December 2025, China filed a complaint with the World Trade Organization against India’s solar photovoltaic subsidies, alleging that they provide an unfair competitive advantage to Indian companies and harm Chinese interests.