Taiwan says China is running a planned "gray zone" harassment campaign around the Kinmen islands, a sign of rising pressure just off China's coast.

• Four Chinese coast guard ships pushed into restricted waters near Kinmen and were escorted out after about two hours.
• It was the second day in a row, and the fourth incursion in four days, using the same ship formation each time.
• Taiwan's coast guard calls it deliberate harassment dressed up as law enforcement, not real policing.
• The ships came in despite strong winds and rough seas, raising the risk of an accident with local boat traffic.
• Taiwan sent patrol boats to shadow each Chinese vessel one-on-one and broadcast warnings in Chinese and English.

Outlook: The repeat pattern suggests more incursions in the coming days, with Taiwan holding to a "no provocation, no retreat" line.