China’s Ministry of Commerce said on Friday it will continue applying anti-dumping duties on imported solar-grade polysilicon from the United States and South Korea, effective Jan. 14, 2026, for an additional five years. The announcement, published as Announcement No. 3 of 2026, follows a final review of existing trade relief measures.

The move aims to address ongoing concerns that unfairly priced foreign polysilicon could harm China’s domestic solar materials industry. Solar-grade polysilicon, a critical raw material for photovoltaic cells, forms an essential component of the global solar energy supply chain.

China first imposed anti-dumping tariffs on U.S. and South Korean polysilicon in 2014, and the measures have been periodically reviewed and extended. The latest extension followed a standard “sunset review” under China’s anti-dumping regulations, which concluded that lifting the duties could lead to renewed dumping and damage to domestic producers.

“The continuation of these tariffs underscores Beijing’s efforts to protect its expanding photovoltaic sector while managing imports from major trading partners amid growing global competition in clean energy technologies,” the Ministry said.