says Tang Yu, a genealogist and historian of mines who wrote 700 Years of Gold Mining in Taiwan and is now being employed by the Yens to trace their family tree. "This was the meaning Yen had for his age."
曾出版《台灣採金七百年》，專治譜學與礦業史，現受聘為顏家纂修家乘的唐羽表示，這是顏雲年的時代意義。