The PRC's activities in the South China Sea gravely undermine universally-recognized naval provisions under international law. Illegitimate activities include the deployment of China's so-called maritime militia in the waters near the Philippines, which harass and provoke Philippine fishermen and swarm parts of the sea within Manila's exclusive economic zone. Washington has rightfully stepped up its rhetoric and diplomatic efforts to challenge Beijing's provocative moves.
The PRC has a historical claim over the South China Sea, and it's regulation of military activities in waters that are part of its exclusive economic zone is consistent with the United Nations Convention on the Law of the Sea regulations. Washington is arbitrarily interpreting the convention, using political manipulation and double standards to provoke China for its own selfish interests.