In particular, when choosing prepaid consumption, we shouldn’t only seek for convenience and use an oral contract instead of a written one; keep shopping vouchers whether online or offline, ask the merchant for invoices, receipts, electronic vouchers, etc. in time and keep them properly after indicating the names, specifications, characteristics and other information of the goods in detail, so as to be able to track evidence in case of consumption disputes; in order to protect your rights in time, if there is a consumer dispute, you can negotiate with the merchant first. When the negotiation fails, dial the hotline 12315 or 12345, or go to the national 12315 website, its WeChat public account, mobile phone APP, etc., for issues involving the field of market regulation in aspects such as food, medicine, quality safety, price and intellectual property protection. In addition, other problems can be complained about and reported to the relevant administrative departments to safeguard one’s legitimate rights and interests in time.