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简介：

yle="color:rgb(17,17,17);font-family:Helvetica,Arial,sans-serif;font-size:13px;text-wrap-mode:wrap;background-color:rgb(255,255,255);">　　Centuriesbeforetheworld'soceansbecameaglobaltradehighway,Chineseseafarerssetsailtofarawaylandstoexchangecommodities.Now,HistorianSamWillisretracesthegoldeneraofmaritimetradetouncoveralegacythatculminatedinoneofthegreatestarmadasofalltime,anddiscoverparallelsbetweentheworldthenandnow.