How to return the carved silver bowl bought in Yunnan?

Can't go back. According to the Return Service Guide of Yunnan Tourism Shopping Return Supervision Center and the Return Service Guide of Yunnan Tourism Return Center issued by official website, Yunnan Provincial Department of Culture and Tourism, we can know that if the physical and chemical properties of goods are changed due to human reasons (such as improper technical treatment or maintenance such as cutting, lettering, punching, grinding and pulverization), returns will not be accepted.