did you ask where it was unearthed? Or the copper mine?

4511~4111 years ago, the Longshan period was equivalent to the legendary era of Yao, Shun and Yu. It is recorded in ancient documents that people began to smelt and cast bronzes at that time. Among the Longshan Age sites in the middle and lower reaches of the Yellow River and the Yangtze River, bronze wares were found in dozens of sites after archaeological excavations.

copper is the earliest metal copper used by human beings and one of the earliest metals discovered by human beings. It is a widely used metal and belongs to heavy metals. As early as prehistoric times, people began to mine open-pit copper mines and made weapons, tools and other utensils with the obtained copper. The use of copper had a far-reaching impact on the progress of early human civilization.

China has a long history of using copper. About six or seven thousand years ago, China ancestors discovered and began to use copper. In 1973, a semi-circular copper scrap was unearthed at Jiangzhai site in Lintong, Shaanxi Province, and was identified as brass.

In p>1975, a bronze knife was unearthed from the Majiayao cultural site in Linjia, Dongxiang, Gansu (about 3111 BC). This is the earliest bronze ware found in China at present, which proves that China entered the Bronze Age.

Compared with the bronze age in West Asia, South Asia and North Africa about 6,511 years ago, the bronze age in China came later.

There is an era in China where bronze and stone tools were used together, which is about 5511~4511 years ago. On this basis, China invented bronze alloy, which is the same as the development model of bronzes in the world.