1. Different sources: Pinduoduo is mainly a social e-commerce platform, and the goods come from various businesses with uneven quality, while the goods obtained are e-commerce platforms mainly based on trendy goods, and the goods mainly come from brands or authorized dealers, so the quality is relatively more guaranteed.

2. Different appraisal services: Wu De provides professional appraisal services, and strictly checks the authenticity and quality of goods to ensure that consumers buy genuine goods, while Pinduoduo does not provide similar appraisal services, so consumers need to judge the quality of goods by themselves.