Filament technology, also known as refined gold technology, is made by drawing gold, silver and copper into filaments and stacking them. Mosaic is made of gold and silver sheets into utensils or patterns, inlaid with gems. Filament inlay has always been a royal thing in history because of its unique materials and complex technology. Its technology has been presented in court ornaments and ritual vessels in past dynasties in China, which is also one of the technological characteristics of traditional luxury goods in China. From a filament to a complete work, it has to go through eight processes: piling, laying, weaving, kneading, filling, storing and welding, and each process is ever-changing. To make filigree inlaid ornaments, it is necessary to go through the processes of tire molding, filigree molding, welding, acid biting (pickling), and then burn blue or gold-plated silver and other surface treatments, and then "inlay gems" or "touch green" to complete the whole process.

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