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Lead in Do you remember these great explorers Zheng He Marco Polo Zhang Qian Christopher Zhang Qian's Columbus Zheng He's Marco Polo's voyages down opening up of voyage in China the ancient Silk Christopher the Western Road and Columbus's discovery Seas of America touring in the Western regionsDo you remember these great explorers ? Lead in Zheng He Zheng He’s voyages down the Western Seas Christopher Columbus Christopher Columbus’s discovery of America Zhang Qian Zhang Qian’s opening up of the ancient Silk Road and touring in the Western regions Marco Polo’s voyage in China Marco Polo
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