Archaeologists have discovered the remains of bronze casting operations at three different locations in Henan Province, and have determined that ancient craftsmen made their molds from pottery clay, and melted the metal in crucibles.
考古發現，河南偃師二里頭、安陽殷墟、洛陽龐家溝等地，都有古人鑄銅的遺址，他們以陶泥作模、以坩鍋熔銅；時過境遷，今人則以矽膠為模，以電爐熔銅。