Please answer the following question: Twilight in the Forbidden City - Twilight in the Forbidden City (Chinese: ; pinyin: Zijincheng de Huanghun) is Reginald Johnston's 486-page memoir of the Xuantong Emperor or Henry Puyi as he eventually became known.Johnston was tutor to the Emperor and an eyewitness to Chinese events in the years of the 1920s and 1930s. Johnston was also a professor of Chinese at the University of London as well as the British Commissioner of Weihaiwei. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Written Work