A Chinese coast guard vessel pushed into restricted waters around Taiwan's Pratas Islands and was shadowed and driven off by a Taiwanese patrol ship, another sign that pressure on Taiwan keeps building.

• Taiwan's coast guard spotted the Chinese ship at dawn and sent the patrol vessel Yunlin to intercept it.
• The two ships sailed side by side in a standoff while Taiwan broadcast warnings in two languages.
• This is the twelfth time this year Taiwan has pushed a Chinese coast guard ship out of Pratas waters.
• Over the radio the Chinese crew called the island "Chinese Taipei" and threatened a heavy price unless Taiwan accepts One China.
• Taiwan replied that it is a sovereign country and warned that a fight in the Taiwan Strait would hit the world economy and the chip industry.

Outlook: These sea confrontations are likely to keep repeating as Beijing uses coast guard patrols to claim authority over waters Taiwan controls.