Purchase and sale of metals, diamonds, gold, platinum, jewelry, silver ornaments, jadeite, colorful treasures, gold, pearls, gifts, clocks and watches, handicrafts (except ivory and its products) and gold ornaments; Jewelry design and technology development; Engaged in e-commerce, domestic trade, import and export of goods and technologies (except for items that need to be approved before registration according to laws, administrative regulations and the State Council decisions).