Yang explains that all items in the collection fall into three main categories: vessels, calligraphy and paintings, and paper artifacts. In the museum's early years, there was a different department to care for the items in each of the three categories. Paintings and paper artifacts, in particular, were never moved around because they were often in very fragile condition.
他表示，故宮文物分為器物、書畫、圖書文獻 3 大類，早期器物的維護歸科技室負責，至於書畫與圖書文獻，由於材質脆弱，以不搬動位置、不改變環境為原則，因此另歸「書畫處」與「圖書文獻處」負責。