The Chinese metropolis of Lanzhou lies along the Yellow River. Over a four-year period, the director Yuan Zheng follows the traces that could have been left by the works on the river, undertaken in the 1950s.
Overview：The Chinese metropolis of Lanzhou lies along the Yellow River. Over a four-year period, the director Yuan Zheng follows the traces that could have been left by the works on the river, undertaken in the 1950s.
