Tensions in the South China Sea escalated as China's military and coast guard conducted patrols near the disputed Scarborough Shoal on Sunday. This move followed a five-day joint maritime exercise between Philippine and US forces aimed at enhancing maritime security cooperation. The People's Liberation Army (PLA) described its patrols as a response to what it termed provocative activities in the region. The Philippine military emphasized its commitment to a rules-based maritime order during the exercises. Philippine Defence Secretary Gilberto Teodoro expressed concerns over ongoing territorial challenges from China, despite recent diplomatic improvements between the US and China. Scarborough Shoal, claimed by both nations, has been the site of numerous confrontations, with a history of vessel collisions. The 2016 ruling by the Permanent Court of Arbitration found China's expansive claims in the South China Sea to be legally baseless, a decision Beijing has rejected. These developments occurred during the Shangri-La Dialogue in Singapore, where regional security issues were a focal point of discussion.