A nuclear-powered People’s Liberation Army submarine fired a test missile on the high seas in the Pacific on Monday, according to Chinese state media.The missile was fired at 12.01pm, state news agency Xinhua said.It added that it was a routine test and was not aimed at any specific country or target. The report said that relevant countries had been notified ahead of time.The test was China’s first known submarine-based missile test since 1982, and the first known to have been fired from a nuclear-powered submarine.The governments of Japan and Australia confirmed they had been given advance notice of the launch.According to Agence France-Presse, Papua New Guinea and New Zealand were also notified.