When did the wrong gold and silver on the ancient beads start?

Gold and silver dislocation technology originated in the Spring and Autumn Period, and its purpose is to beautify two objects with different metallic luster.

The application of gold and silver crafts in bronze ornaments began in the middle of the Spring and Autumn Period, prevailed in the Warring States Period, and gradually declined after the Western Han Dynasty. Its general practice is to pre-cast or chisel the grooves needed for patterns and inscriptions on the bronze surface, then embed gold and silver silk pieces, hammer them firmly, and then polish them with wax stone to achieve the decorative effect of highlighting patterns and inscriptions.