Architectural Modulus in Ancient China: The Great Hall of Yanfu Temple in Wuyi County

The Yanfu Temple in Wuyi County is one of the few Yuan Dynasty wooden structures in Jiangnan, which is representative in the history of architecture. Based on the proportionality of each structural parameter of the building, the Yingzao chi (Construction ruler) was calculated to be 315. 48 mm, using the large and small rulers system that has been used since the Tang and Song dynasties. It did not adopt the cai-fen system of the Yingzao Fashi (The Methodology of Official Architecture in the Northern Song Dynasty), but instead used the architectural module system. This modulus is a series modulus, very similar to the modern building modulus.