Written in the early Ming Dynasty, the book Voyage with a Tail Wind (Shun Feng Xiang Song) recorded Diaoyu Dao explicitly. From 1403 to 1424, based on the experience of the voyagers to Western seas, Chinese officials revised the book several times. The copy now housed in Bodleian Library of Oxford University was published during the reign of Emperor Wanli (1573-1620) of the Ming Dynasty. It clearly recorded the names of islands regularly passed by Chinese voyagers including “Diaoyu Yu” and “Chikan Yu” (known today as Diaoyu Dao and Chiwei Yu). The publication testifies to the fact that Chinese people discovered and named Diaoyu Dao as early as the 14th and 15th centuries.