The “Tongan ship ‘Ji’ Diagram” and the “Tongan ship ‘No. 1’ Diagram” ofthe Palace Museum are the most important drawing records regarding the Tonganships. Their subjects are the heaviest and most powerful fighting ships of theTongan ship family. These two diagrams are not only just highly detailed.They are accompanied with corresponding official memorials. They are not justnaval history artifacts. They represent a field previously unexplored byTaiwan’s historians and naval history historians.