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

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.

A Ministry of Commerce taskforce is collecting lists of items that could be exempted from tariffs and is asking companies to submit their own requests, according to a source who spoke on condition of anonymity.