Wholesale of jewelry; Sales of gold and silver products; Sales of metal ores; Sales of metal products; Jewelry retail; Jewelry manufacturing; Sales of metal chains and other metal products; Internet sales (except for the sale of goods that need to be licensed); Domestic trade agency; Manufacturing of metal materials; Information technology consulting services; Information consulting services (excluding licensed information consulting services); Real estate consulting; Conference and exhibition services; Trade brokers; Import and export of gold and its products; Technology import and export; Import and export of goods