由于明成化年间一位兵部大臣刘大夏,将郑和下西洋有关档案史料销毁,给我们的研究带来不小的困难,如郑和乘坐的长四十四丈四尺,宽一十八丈的大宗宝船的船型、尺度、数量以及造于何地都成了问题。经多年来专家学者的不懈努力,现已取得相当的成果,证明宝船厂在南京,从真正意义上说郑和是从南京出发的。 Due to the fact that during the Ming Dynasty, Liu Daxia, a soldier minister, destroyed the archives of Zheng He and other western countries, it brought no small difficulty to our study. For example, Zheng He took a 44-foot-4-foot and 18- The bulk, the size, the quantity, and where it is made have all become problems. After years of unremitting efforts by experts and scholars, considerable achievements have been made to prove that Bao Shipyard is in Nanjing. Zheng He actually started from Nanjing.