Li Anqi Jewelry launched different gold jewelry exchange activities in different time periods. In Hohhot and Urumqi, Li Anqi Jewelry once launched the activity of exchanging old gold for new gold. Among them, 18K gold jewelry does not need to pay the cost of production, while gold jewelry needs to pay the cost of production per gram of 8 yuan or 5 yuan. 20 19 On Thanksgiving Day, June 26-28, Li Anqi Jewelry in Urumqi launched a gold trade-in activity. Gold jewelry exchange needs to pay the cost per gram of 5 yuan, and at the same time, you can participate in the exchange activities of gold jewelry appreciation 10%, so it is appropriate to exchange gold jewelry.