Gold plating is to synthesize gold amalgam from gold and mercury, coat it on the surface of bronze ware, and then heat it to evaporate mercury, so that gold will adhere to the surface of the ware. The starting time of gold-plating technology should be set at the end of the Spring and Autumn Period or the beginning of the Warring States Period. The record of gold amalgam was first seen in the Book of Changes, written by alchemist Wei Boyang in the Eastern Han Dynasty. The record of gold plating technology was first seen in the Liang Dynasty.

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