Pinduoduo is a well-known e-commerce platform in China. After years of development, a perfect shopping system and credit evaluation mechanism have been established. Merchants on the platform need to abide by relevant laws and regulations, and Pinduoduo will also audit and supervise the merchants to ensure the legality and quality of the goods. When selecting precious jewels, the goods are appraised by official appraisers to ensure their authenticity and reliability. These goods are officially certified formal goods, and customers can buy them with confidence.