China has placed Lockheed Martin Corp and Raytheon Technologies Corp under sanctions over arms sales to Taiwan, the government said on Monday, at least the third time it has announced punishments against the U.S. companies. The sanctions are countermeasures against the two companies over a $100-million Feb. 7 arms sale that “undermined China’s security interests, seriously undermined China-U.S. relations and peace and stability in the Taiwan Strait”, foreign ministry spokesman Wenbin said at a regular news briefing. Beijing views the self-ruled island of Taiwan as a breakaway province that must accept Chinese sovereignty and has never renounced the use of