Bronze ware first happened in Anatolia, which is the area of two river basins. About 8000 years ago, people knew how to make copper from bronze. In 7000 BC, Sumer followed, which was also very close to Anatolia, probably what we called Semu people in history. They also studied metallurgy in 6000 BC. Before that, people worked in copper mines and collected some natural copper. Through forging, they discovered this property of copper, which is some cognitive processes in the early stage.
In Egypt, it entered the Bronze Age about 4000 BC, a little later in Europe, about 3000 BC, and 3000 BC in South America. People entered the bronze age, but this civilization soon became extinct. India was also a little earlier than China. It entered the Bronze Age around 3000 BC, but it soon declined.