The Gujin Tushu Jicheng (simplified Chinese: 古今图书集成; traditional Chinese: 古今圖書集成; pinyin: Gǔjīn Túshū Jíchéng; Wade–Giles: Ku-chin t'u-shu chi-ch'eng; literally: "Complete Collection of Illustrations and Writings from the Earliest to Current Times"), also known as the Imperial Encyclopaedia, is a vast encyclopaedic work written in China during the reigns of the Qing Dynasty emperors Kangxi and Yongzheng. It was begun in 1700 and completed in 1725. The work was headed initially by scholar Chen Menglei (陳夢雷), and later by Jiang Tingxi.