The chair of the US-China Economic and Security Review Commission called recent Chinese military patrols east of Taiwan "destabilizing," Reuters reported. The remark is among the clearest signals yet that Beijing's naval and air activity around Taiwan is spreading beyond the Taiwan Strait to the island's Pacific-facing side.

Why it matters: the patrols edge China's military presence toward the open Pacific routes the United States and regional allies would rely on to reinforce or supply Taiwan in a crisis. Hypothesis: the wider patrols may be testing how much latitude Washington and Tokyo will tolerate beyond the strait — a shift neither government has yet addressed publicly.