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In page Taiwan Strait:

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The Strait mostly separated the Han culture of the Chinese mainland from Taiwan Island's aborigines for millennia, although the Hakka and Hoklo traded and migrated across it. European explorers, principally the Spanish and Dutch, also took advantage of the strait to establish forward bases for trade with the mainland during the Ming; the bases were also used for raiding both the Chinese coast and the trading ships of rival countries.[citation needed]