Introduction to the Bronze History and Culture Gallery: The Yunnan region had copper mining and smelting technology as early as 3,000 years ago in the late Shang Dynasty of my country, and began to cast and use bronzes. In the Warring States Period around 2,000 years ago By the Western Han Dynasty, the highly developed ancient Dian bronze culture had emerged. The bronze sculptures in the Bronze History and Culture Gallery were imitations of bronze wares from that period, including bronze pillows, bull heads, shell storage vessels, gourds, bull and tiger bronze cases and King Jinyin of Dian and others.