I can't find the receipt of the silver bracelet I bought. I can exchange it. However, for jewelry and jade articles (including silver ornaments), regardless of the after-sales service of new products or old products, the industry return and exchange regulations are implemented: there is no reason to return and exchange within seven days. Jade belongs to expensive jewelry, which is different from daily necessities, so his return policy is harsh and there is no reason to return it within seven days. If the merchant has further discount or guarantee, it can be written on the invoice. If the business has no commitment, it is purely personal behavior, then it depends on personal feelings. Invoice is actually a voucher between the shopping citizens and the merchants, which proves that the citizens have consumed the goods of the merchants, and it is also a powerful basis for the national tax department to collect and manage the value-added tax. Citizens who lose their invoices after shopping shall report the loss to the tax authorities within one month from the date of the loss of invoices in accordance with the penalty requirements of Article 36 of the Measures for the Administration of Invoices in People's Republic of China (PRC), and go through the invoice formalities again. If citizens have other circumstances, it depends on the specific situation.