Yin Collection, Upper Volume Radical: Roof (bù) Entry: Cheng Kangxi Stroke Count: 10 Page 285, Entry 11 Pronounced cheng According to the Explaining Graphs and Analyzing Characters (Shuowen Jiezi), it refers to what a house contains or accommodates. According to the Supplement to the Collection of Characters (Zihui Bu), it is a room for storing books. During the Ming Dynasty, the Great Inner Palace contained the Imperial Historical Archives (Huangshicheng), where the imperial brushes, veritable records, and secret canons of successive emperors were stored. Sometimes also written in a variant form.