Group 1 - The U.S. has suspended the sale of certain critical technologies to China, including jet engine-related technology, targeting COMAC, which is developing the C919 aircraft to compete with Airbus and Boeing [1] - The U.S. Department of Commerce has halted licenses that allow American companies to sell products and technologies to COMAC, which are essential for the development of the C919 aircraft [1] - China has expressed strong opposition to the U.S. for misusing national security concepts and imposing export controls to suppress China [1] Group 2 - The suspension of engine supplies could lead to economic losses for companies involved in existing procurement agreements, potentially hindering the delivery of commercial aircraft in China [2] - The U.S. has also paused exports of semiconductors and certain chemicals and machinery technologies to China in response to recent Chinese restrictions on key mineral exports [2] - U.S. companies, including Cadence, Synopsys, and Siemens EDA, have been notified to stop supplying EDA technology to China, which is crucial for chip design processes [2] Group 3 - Experts believe that the U.S. measures may be ineffective, as Chinese companies could benefit from the blockade of EDA exports, with Huawei recently announcing the development of its own EDA tools [3] - Following the announcement of the new restrictions, stock prices of Chinese EDA companies have surged [3]