Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Sanctions Signal Tougher US Stance toward Beijing over South China Sea Ralph Jennings TAIPEI, TAIWAN - First-time U.S. sanctions against a group of Chinese companies believed to have helped China fortify disputedisletsin an Asian sea signal a tougher policy by Washington toward its rival superpower's maritime expansion, analysts say. The Bureau of Industry and Security under the U.S. Department of Commerce added 24 Chinese companies to a list that the bureau uses to restrict exports, re-exports and in-country transfers of items that could flout national security or foreign policy interests. Companies landed on the list because they helped the Chinese military "construct and militarize the internationally condemned artificial islands in the South China Sea," the department said in an August 26 statement. Those islets, many built on reclaimed land, now support hangars, radar facilities and small civilian populations. The sanctions won't hurt the target companies but show the United States is toughening its stance, long term, toward Chinese expansion in the South China Sea, said Andrew Yang, secretary-general of the Chinese Council of Advanced Policy Studies think tank in Taiwan. Washington does not claimany ofthe 3.5 million-square-kilometer sea but wants it kept open for international use. Brunei, Malaysia, the Philippines, Taiwan and Vietnam dispute all or part of China's claims to about 90% of the waterway, which is valued for fisheries and energy reserves. Expansion of the islets contributed to China's military lead over the other governments. .