sòng lǐ shí kě yǐ qù diào jià gé dàn zuì hǎo bǎo liú xiǎo piào huò diàn zǐ píng zhèng

送礼时可以去掉价格，但最好保留小票或电子凭证。

When giving a gift, you can remove the price tag, but it's best to keep the receipt or electronic proof.