"The smallest number are from the 18th century because at that time China shut itself off from the outside. You can thus see that the making and existence of maps has always been intimately tied in with the international situation."
「18 世紀最少，原因是當時中國鎖國，對外封閉，可見地圖的存在、繪製與世界局勢一直息息相關。」