China appears to have quietly rolled back retaliatory tariffs of 125% on some semiconductors made in the United States, according to details provided to CNN on Friday by three import agencies in the southern technology hub of Shenzhen.

Levies on certain U.S.-made microchips have been dropped, importers say. Meanwhile, China denied President Trump’s claims that talks to reduce tariffs are happening.

An American business group said Chinese officials had surveyed companies about American products that are crucial to their supply chains.