The location referred to by the Chinese Embassy is Pagasa Island and the Pagasa Cays, which form an integral part of the Kalayaan Island Group of the Philippines. These features have never been part of China. The recent activity in this area was undertaken by Philippine civil society and was not the result of any deployment or operation ordered by the Philippine government.

This area lies several hundred nautical miles from the Chinese mainland. It therefore cannot infringe upon any legitimate Chinese territorial sovereignty, as none exists here under international law. China cannot …

The Chinese Embassy’s statement is telling. It is asserting that their research vessels are conducting scientific missions in “waters of the South China Sea under Chinese jurisdiction,” this means that they are openly admitting to violating the United Nations Convention on the Law of the Sea (UNCLOS) and ignoring the 2016 South China Sea Arbitral Award.

Just in case they forget, the Arbitral Tribunal clearly ruled that China’s claims of “historic rights” within the so-called nine-dash line have no legal basis. Areas within the Philippines’ Exclusive …