On the Pinduoduo platform, users can sell second-hand goods. The seller needs to prepare the items to be sold and release the product information according to the regulations of Pinduoduo. When delivering goods, sellers need to provide accurate descriptions of goods, conditions, prices, logistics methods and other information, so that buyers can understand the real situation of goods. Sellers should be honest and trustworthy, abide by the platform regulations, and communicate with buyers to ensure the smooth progress of the transaction.