Two Chinese coast guard ships pushed into restricted waters around Taiwan's Pratas Islands, and Taiwan sent patrol ships to shadow them — a tense standoff that adds to the strain in the region.

• Chinese coast guard vessels crossed into the restricted zone around Pratas in the morning; Taiwan's coast guard tracked them and ordered them out over radio in Chinese and English.
• Taiwan sent one ship to intercept early and a second as backup; both sides are still facing off at the scene.
• This is the fifth Chinese coast guard vessel to enter these waters this year, across 11 separate trips.
• The timing looks deliberate — the ships arrived right after Taiwan wrapped up its big annual Han Kuang military drills.
• One Chinese ship radioed that Taiwan's vessel belonged to the "Chinese Taiwan coast guard," a claim Taipei rejected outright.

Outlook: Expect more of these patrols as Beijing keeps testing Taiwan's control over the area, with each encounter raising the odds of an accident at sea.