Archaeologists recently unearthed a large cooper factory ruins in Wuhan, Hubei province, which dates back to the Shang Dynasty (c.16th century-11th century BC).
It is the largest set of such ruins along the Yangtze River to be discovered so far, according to the Hubei Institute of Cultural Relics and Archaeology.
The factory, which is around 3,300 years old, covers an area of 3,000 square meters, and is part of the large Guoyuanzui relic site in Wuhan's Huangpi district.