You can change it without an invoice, because Lao Fengxiang's gold wares are all engraved with Lao Fengxiang's subtitles or words, and the sales staff will know that they are their own gold ornaments and can change them at home.

But different places have different exchange rules, some places will be damaged, and some places will not, so we can't generalize. You will be given a new ticket after the exchange.