Lin Po-ting, head of the National Palace Museum's Department of Paintings and Calligraphy, explains that the system of restricting the display of certain works is intended to preserve them, and mainly applies to "rare and ancient" works from the Song and Yuan dynasties or earlier.
故宮書畫處處長林柏亭解釋，書畫限展，是基於維護觀念，以「年高古稀」的宋元及之前的作品為主，好使之「延年益壽」。