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- China has the world's largest coast guard fleet, and it's still building up on an ambitious scale.
- It's been taking ships from its navy and could be getting its own vessel modeled after a destroyer.
- Experts say the acquisitions mean it's moving closer to being a naval reserve or auxiliary force.
In May, military experts spied a peculiar, half-built vessel sitting among warships at a Shanghai dockyard.
Satellite images showed it had the shape and size of a Type-052D, an advanced guided-missile destroyer in China's navy.