1, merchant reputation: you can check the history, evaluation, complaint rate and other information of the merchant to understand the reputation and reputation of the merchant.
2. Product quality: you can try to buy products and check their quality, including raw material quality, processing technology, taste and so on.
3. Rationality of price: You can compare the product price of this brand or business with the prices of other businesses in the same industry to judge whether the price is reasonable. 4、
Whether there is fraud: if there are signs of false propaganda, exaggeration of product efficacy and malicious deduction of money, there may be fraud.