In the period of Xia, Shang and Zhou Dynasty (2100 BC – 771 BC), the bronze farm tools began to be applied into production of agriculture because of the invention of smelting technology of metals. Thus, the agriculture technology stepped forward to the first stage of development.
INDUSTRY：
The foundry technology of bronze in ancient times can be divided into these aspects:
1. Some parts of mould combine with each other to become a big mould for foundry.
2. Respectively casting or enchasing.
3. Fine material for foundry and paint coat on the surface.
4. In the field of process technology, there are plating, welding and forging.
Because of these special measures, it’s possible to produce fine casting, huge object, curved horn, complicated dragon’s head, toggle chains, different patterns, hollowed-out rim, etc.
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