I want to know the answer to the following question:
When was copper thought to have been discovered in China?
All the background I'm provided with is that "It has a history of use that is at least 10,000 years old, and estimates of its discovery place it at 9000 BC in the Middle East; a copper pendant was found in northern Iraq that dates to 8700 BC.". Is that enough to answer the question?
Answer: no