The existence of metalworking fee is reasonable, because the cost of gold jewelry is high, and jewelry stores go to the factory to get gold jewelry. In fact, metalworking is also separate. It is normal that the styles and crafts of gold jewelry are different, and the cost of each piece is different. It is relatively reasonable to charge according to the gold style and technology, and it would be better if the gold price could be cheaper. A long time ago, there was no so-called "processing fee" for buying gold jewelry, which was calculated by weight. The absence of the gerund "processing fee" does not mean that there is no processing fee (unless you need to modify the style) because the network technology was not so developed before, and the international gold price was not so transparent every day, and the gold price was probably within a range. Modern network information is developed, and we can keep abreast of the fluctuation of international gold. Gold raw materials have become very transparent, and the only way to generate added value on the basis of gold price is processing fee (labor fee, which is also the only profit point for merchants). Therefore, as long as any commodity is manually reprocessed, it will produce processing costs (factory production costs). If it is a brand, it is called the added value of brand products.