China which rejected the verdict initiated by the Philippines petition has stepped up air and naval patrols to assert its controls over the region.
Three naval ships of China's Nanhai Fleet left a naval port in Sanya, Hainan Province on Wednesday, kicking off an annual combat drill in the South China Sea, East Indian Ocean and West Pacific, state-run Xinhua news agency reported.
The Chinese navy has kicked off 10-day military exercises in the disputed South China Sea amid heightened tensions in the region, especially with the United States.
Asking the US to respect the efforts by China and India to resolve their boundary dispute peacefully, a top Chinese official on Monday said the two nations are wise enough to deal with it after the Pentagon accused Beijing of deploying more troops along the Sino-India borders.
An international tribunal in the Hague has ruled in favour of the Philippines.