The invalid refund service of weight-loss Chinese medicine with many products is credible because the platform of many products has perfect after-sales service and refund policy. If consumers do not get good results after purchasing Chinese medicine slimming products, they can get compensation through the refund service of Pinduo platform, thus protecting their rights and interests. In addition, the invalid Chinese medicine refund service in Pinduoduo is also a priority service commitment of consumers, which can improve consumers' trust and satisfaction, and increase the sales volume and market share of the platform.

It should be noted that the refund service can be conducted for specific products or services. For details, please refer to relevant policies and regulations of Pinduoduo Platform. At the same time, consumers also need to make rational choices when purchasing Chinese medicine slimming products, and know the ingredients, efficacy, manufacturers and other information of the products to avoid being deceived by false propaganda or illegal businesses.