Tmall, JD.com and Pinduoduo have authentic merchants, but there are also fake products. As a well-known e-commerce platform in China, Tmall and JD.com have strict quality control and after-sales processes, and most of the merchants are formal and legal. At the same time, these two platforms also have certain after-sales protection and consumer rights protection mechanisms, which can protect the rights and interests of consumers. As a platform with grouping and low prices as the main selling point, Pinduoduo's quality control and management are even weaker, and there are problems of fake and parallel imports. When purchasing a product, consumers should choose a trusted merchant to buy through a comprehensive consideration of the business qualifications and evaluation of the merchant. At the same time, if there is a problem with the received goods, you should contact the merchant and the platform for rights protection in time.