China Deploys CCG Patrols East of Taiwan in Response to Japan-Philippines Maritime Boundary Delimitation Talks; Beijing Calls Talks 'Completely Illegal, Null and Void'

China's Coast Guard conducted 'law enforcement patrols' in waters east of Taiwan on June 1, 2026, in direct response to Japan and the Philippines formally announcing the launch of maritime boundary delimitation talks during a summit between Japanese Prime Minister Sanae Takaichi and Philippine President Ferdinand Marcos Jr. in Tokyo on May 29, 2026. The two countries agreed to negotiate the boundaries of their respective exclusive economic zones and continental shelves 'in accordance with international law.' China's Coast Guard declared the patrol 'a necessary action taken in response to Japan and the Philippines unilaterally announcing the initiation of maritime boundary delimitation negotiations in the waters east of China's Taiwan island,' urging both countries to 'immediately cease all illegal actions that infringe upon China's sovereign rights and interests.' China's Foreign Ministry spokesperson Mao Ning characterized the talks as 'completely illegal and invalid' and 'null and void,' claiming the relevant waters overlap with China's claimed EEZ and continental shelf. Taiwan's Foreign Ministry countered that 'China has no right to interfere in Taiwan's territorial sovereignty and sovereign rights over its relevant maritime areas.' The Japan–Philippines maritime boundary delimitation talks represent a deepening of the bilateral alliance following the Reciprocal Access Agreement (entered into force September 2025) and Japan's first overseas combat-capable JSDF deployment to the Philippines since WWII during Balikatan 2026. China's CCG patrols east of Taiwan extend Beijing's gray zone operations from the South China Sea into the western Pacific, creating a new front simultaneous with the ongoing Scarborough Shoal, Second Thomas Shoal, and Pag-asa Island standoffs.