High cost performance. As a world-famous jewelry trading center, Hong Kong has rich choices of brands and styles and relatively low operating costs. The prices of gold raw materials in the Mainland and Hong Kong are basically the same, mainly composed of international gold prices and domestic gold prices. However, due to the relatively loose tax policy in Hong Kong, the processing and sales costs are relatively low. The exchange rate between Hong Kong dollar and RMB is 0.8 1 17. A thousand gold necklaces in a gold shop in Hong Kong are marked with 0.875 taels. The price is HK$ 17800 per pair. The purchase price is: every two prices x gold weight x exchange rate =17800x0.81kloc-0/7 ÷ 37.5 =12642 RMB. Therefore, the price per gram of gold: price per quantity x exchange rate ÷ 37.5 = 178000 RMB. The basic gold price in Chinese mainland is 507.80 yuan/gram. In the mainland, the retail price of gold jewelry also includes brand premium, store rent, labor costs and other expenses. In Hong Kong, these costs are relatively small, and consumers can enjoy more favorable prices.