A factory along a river in Zhongshan in 1974

Source

涂克，整治秦淮河， 1960

Building the Xin’anjiang Hydro-power Plant in 1959

Source

February 24, 2015

February 13, 2015

Mao Investigates a Model of the Dujiangyan Irrigation System, Sichuan, March 21, 1958

February 8, 2015

February 6, 2015

The Xinjiang Construction Corps Build a Reservoir, 1950s

February 3, 2015

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