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... Taiwan's coast guard has documented five cases totaling 38 Chinese citizens crossing the 160-kilometer (100-mile) wide Taiwan Strait separating the self-governing island democracy from the authoritarian Chinese mainland, according to the body's deputy director-general Hsieh Ching-chin.

That includes at least one case posted to Douyin, the Chinese version of TikTok, in which a man speaking with a strong mainland Chinese accent is seen planting a Chinese flag on what he says is a Taiwanese beach. Scenes in the background appear to show a stretch of coastline south of the capital Taipei.

China claims Taiwan as its own territory, to be conquered by force if necessary. The man has not been found or publicly identified, and Taiwanese authorities are seeking to ascertain whether he received help from anyone on the island.

Another case involved a father and son who were apprehended shortly after reaching land, along with a man who came ashore at a fishing port in a popular tourist area north of Taipei.

The small size of the boats, some just inflatables for having fun at the beach, makes it difficult for Taiwan's radar to pick them up. ...