At the Dongjiao Branch of the China Railway Museum in Beijing stands a special train. Over 26 years, from 1949 to 1975, Mao Zedong boarded it countless times, gathering information on inspection tours across the country.

China's socialist revolution had been won, and the main task confronting the Party was building a socialist society. This video explains how the mission was accomplished during many long, uncharted, and arduous exploratory journeys.