This is a series of office supplies designed according to the appearance and shape of the Great Hall of Shenyang Forbidden City, with book stands, bookmarks and rulers. The shape of Dazheng Hall is extracted and simplified. The use of book stands can deepen and spread the image of Dazheng Hall in Shenyang Forbidden City. Bookmarks record life pages load history with visible history. The ruler appearance is made by combining the shape of Dazheng Hall and the Eight Banners flag to measure the scale of life.