US President Barack Obama said Washington is concerned China is using its "sheer size and muscle" to push around smaller nations in the South China Sea, just hours after Beijing gave a detailed defence of its creation of artificial islands in the contested waterway.
China's rapid reclamation around seven reefs in the Spratly archipelago of the South China Sea has alarmed other claimants, such as the Philippines and Vietnam, and drawn growing criticism from US government officials and the military.
While the new islands will not overturn US military superiority in the region, workers are building ports and fuel storage depots and possibly two airstrips that experts have said would allow Beijing to project power deep into the maritime heart of Southeast Asia.
"We think this can be solved diplomatically, but just because the Philippines or Vietnam are not as large as China doesn't mean that they can just be elbowed aside," he said.
China, which has asked Washington not to take sides in the row, says it is willing to discuss the issue with individual countries directly involved in the dispute.
Chinese Foreign Ministry spokeswoman Hua Chunying earlier sketched out plans for the islands in the Spratlys, saying they would be used for military defence as well as to provide civilian services that would benefit other countries.
"We are building shelters, aids for navigation, search and rescue as well as marine meteorological forecasting services, fishery services and other administrative services" for China and neighbouring countries, Hua said.
RARE DETAIL
It is rare for China to give such detail about its plans for the artificial islands.
All but Brunei have fortified bases in the Spratlys, which lie roughly 1,300 km (810 miles) from the Chinese mainland but much closer to the Southeast Asian claimants.
Asked about Hua's comments, US State Department spokesman Jeff Rathke called the land reclamation "destabilising" and said it was "fuelling greater anxiety within the region about China's intentions amid concerns that they might militarize outposts on disputed land features in the South China Sea".
"We very much hope that China would recalibrate in the interests of stability and good relations in the region," he told reporters in Washington.
Western and Asian naval officials privately say China could feel emboldened to try to limit air and sea navigation once the reclaimed islands are fully established.
The UN Convention on the Law of the Sea does not legally allow for reclaimed land to be used to demarcate 12-nautical-mile territorial zones, but some officials fear China will not feel limited by that document and will seek to keep foreign navies from passing close by.
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