China’s commerce minister warned the United States on Sunday that if it launches a “trade war” against China by levying punitive tariffs on Chinese imports, the United States will suffer the most.

Chen Deming also said the U.S. government’s “obsession” with China’s exchange rate could not be seriously addressed until it stopped blocking the export of high-tech products, such as supercomputers and satellites, to China. “If some congressmen insist on labeling China as a currency manipulator and slap punitive tariffs on Chinese products, then the [Chinese] government will find it impossible not to react,” Chen said in an interview with The Washington Post. “If the United States uses the exchange rate to start a new trade war, China will be hurt. But the American people and U.S. companies will be hurt even more.”