Changhuan Island is located in the middle of the park, and its overall shape is like a round ring.

On weekdays, most of the Changhuan Island will be completely submerged by sea water, and only ten islands and hills above sea level are exposed, changing into ten small islands distributed symmetrically.

On a certain day every year, there will be a large ebb tide on Changhuan Island, and then this peculiar island will reveal its complete shape.

In addition to humans, the long ring

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