When purchasing goods or receiving services, consumers should choose regular and qualified merchants and try to choose regular and well-reputed supermarkets and farmers’ markets, as regular merchants normally have stricter quality control and guaranteed the quality of commodities. Be carefully when buying roadside cheap peddling goods and other items of unknown origin; don’t believe in oral publicity easily, and treat advertisements rationally. The elderly should be vigilant especially. Don’t be trapped by the promises of marketing personnel. Don’t believe in pure publicity, but compare goods and prices in different shops, and shop on demand and rationally; sign a written contract, pay attention to the difference between “earnest money” and “deposit”, and make sure whether there are unreasonable terms in the contract and liability for breach of contract.