The U.S., where fentanyl abuse has been a major cause of death, has pushed China for deeper law enforcement cooperation, including tackling illicit finance, arrests of rogue chemists and raids of labs involved in the production of precursors.

China said it has forcefully cracked down on the fentanyl trade and condemned President Donald Trump’s tariffs, as the world’s two largest economies remain at odds over the conditions for any talks to cool tensions.

China is willing to do more to address U.S. concerns about illicit fentanyl trade, an official from the Ministry of Foreign Affairs told reporters Wednesday.