The U.S. has reportedly ordered the world’s largest chipmaker not to send its advanced artificial intelligence chips to China anymore.

China’s semiconductor index surged to nearly a three-year peak on Monday, fueled by expectations that new U.S. export restrictions on Taiwan Semiconductor Manufacturing Co. (TSMC) could expedite China’s push for semiconductor self-sufficiency.

The new order, set to take effect on Monday, comes weeks after TSMC notified the Commerce Department that one of its chips had been found in a Huawei AI processor.

The U.S. Department of Commerce has ordered Taiwan Semiconductor Manufacturing Co (TSMC) to cease shipments of advanced chips to Chinese customers. This action, effective Monday, targets chips used in artificial intelligence applications and follows the discovery of a TSMC chip in a Huawei AI processor,