HONG KONG — China said on Tuesday that it would begin banning the export of several rare minerals to the United States, an escalation of the tech war between the world’s two biggest powers. The move comes a day after the Biden administration tightened Chinese access to advanced American technology.

As China responds to the latest U.S. measures by banning the export of several key minerals, one analyst warns of "a trade war that has no winners."

China announced Tuesday it is banning exports to the United States of gallium, germanium, antimony and other key high-tech materials with potential military applications. The Chinese Commerce Ministry announced the move after the Washington expanded its list of Chinese companies subject to export controls on computer chip-making