The Shang Dynasty occurred between 1760 - 1520 BCE in Ancient China. This age brought forth the use of bronze for tools, weapons and artifacts. We can see great metal works from this period through the archeological digs.
An interesting look at the history of China can be found in the book Money Changes Everything by William Goetzmann. A great book that everyone should read if you want to know more about the history of money including Ancient China.