Bronze（powder） is a huge creation in the history of mankind. It is an alloy of red copper and tin and lead (except for zinc and nickel, the alloys that participate in other elements are called bronze), and it is also the earliest alloy in the history of metal casting. After the creation of bronze, it immediately became popular. From then on, the history of mankind will enter a new stage – the bronze age. Generally, the development of China’s bronze civilization is divided into three major stages, namely, the formation period, the heyday and the change period. The formation period refers to the age of Longshan, dating from 4500 to 4000 years; the peak period is the age of bronze in China, including Xia, Shang, Xi Zhou, Chunqiu and the early Warring States period. It lasts for more than 1,600 years, and it is also the traditional system of China.
The age of bronze civilization; the period of change refers to the late Warring States Period – the Qin and Han Dynasties, bronzes have gradually been replaced by iron, not only in large numbers, but also from the original ritual and music weapons and used in ceremonial sacrifices, campaigns and other important occasions into daily utensils The corresponding varieties, structural features, and decoration art have also undergone a turnaround. Bronze is an alloy of many metal components such as copper, tin, lead, etc., so the copper has various colors ranging from golden to snowy white due to the different ingredients. For example, copper with a write share of zinc appears brass, while copper with a certain proportion of nickel has a white copper color. The first copper parts are mainly made of bronze. Such as the bronze fasteners on the furniture of the Spring and Autumn Period and the Warring States period.