Yeh said that Taiwan is the only country in the world where lighthouses are operated by the customs authorities. Taiwan currently has 34 lighthouses left, each with its own characteristics. The earliest was Wangkao Tower in Tanshui, which no longer exists.
他指出，台灣海關是世界唯一經營燈塔的國家，現存的三十四座燈塔各有特色，最早的燈塔是淡水的望高樓，雖已淹沒，淡水老街的福佑宮中仍可見到相關的碑文。