Yingzao Fashi
Revolving bookcases, known as "zhuanluntang", have been documented in imperial China, and its invention is credited to Fu Xi in 544. Descriptions of revolving bookcases have been found in 8th- and 9th-century Chinese texts. Revolving bookcases were popularized in Buddhist monasteries during the Song Dynasty under the reign of Emperor Taizu, who ordered the mass printing of the Buddhist Tripiṭaka scriptures. An illustration of a revolving bookcase is depicted in Li Jie's architectural treatise the "Yingzao Fashi".