Zhang Zudao was the apprentice of leading Chinese sociologists Pan Guangdan and Fei Xiaotong and graduated from the department of sociology of Tsinghua University in the 1940s. Fei Xiaotong went to Jiang village to investigate 27 times from 1957 to the 1990s. Zhang went there with his teacher 5 times and recorded the change from an agricultural to an industrial economy with his camera. The two sets of pictures taken in 1957 and 1982 are especially precious for they record of beginning and end of collectivization. (Curator: Jiang Wei)