China has appointed a new trade negotiator in the midst of its tariff fight with the United States as the world’s two largest economies steadily increase tariffs on each other’s goods.

China on Wednesday named Li Chenggang as vice minister of commerce and the new international trade negotiation envoy amid an ongoing trade war with the United States.

President Donald Trump‘s administration has hiked tariffs on Chinese imports to the U.S. by up to 245%, as per a fact sheet released by the White House on Apr. 15. Trump signed an executive order launching an investigation into the national security risks posed by American reliance on imported critical minerals and their derivatives.