The Yingzao Fashi is a technical treatise on architecture and craftsmanship written by the Chinese author Li Jie, the Directorate of Buildings and Construction during the mid Song Dynasty of China. He revised many older treatises on architecture from 1097 to 1100. By 1100, he had completed his own architectural work, which he presented to Emperor Zhezong of Song. The emperor's successor, Emperor Huizong of Song, had the book published in 1103 to provide architectural standards for builders, architects, literate craftsmen, and the engineering agencies of the central government. Li Jie was then made the Director of Palace Buildings. Thereafter, Li helped oversee the construction of administrative offices, palace apartments, gates and gate-towers, the ancestral temple of the Song Dynasty, along with numerous Buddhist temples.