Some problems about Chinese bronzes and Japan and South Korea

1. Whether bronzes were introduced into Japan and South Korea is not recorded in history, but it is all archaeological speculation. China invented iron and abandoned bronzes in the Han Dynasty. At that time, there was no writing in Japan and South Korea, so it was impossible to form a record.

2. Before the invention of iron smelting technology, people could only make tools with bronze, which was much better than tools made with stones and sticks. Therefore, in the international history, a nation can only be called into the era of civilization if it has mastered bronze technology. At that time, people used bronze to make farm tools, tools, weapons, household utensils, etc. After the invention of iron, bronze was only used to make sacrificial utensils.

3. In Dayu era, Jiuding was cast as a symbol of Kyushu, and since then it has been handed down as a symbol of political power. Although Japan and South Korea were affected, they did not have such feelings as China.