Copper foetus pig pair of gold or silver.Specification: 7.5 cm wide and 6.7 cm high total weight of 564 g.Technology is to use two of gold or silver metal, appeared in a different luster pattern of the process.The use of technology of gold or silver on the bronze trim, began in the mid spring and autumn, prevailing in the warring states period.Covering general blackish green verdigris, and ornamentation of gold or silver light do not decrease, yi yi is unripe brightness, beautiful.