Public comment network can delete bad reviews as long as it has money. Merchants who don't participate in group buying or make money for them all publish bad reviews or holiday content on the Internet to denigrate the merchants. People who really have money to spend don't comment on the public, so there are few comments from merchants, and most of the comments on the Internet are poor, and many of them can't be managed. Many people deliberately criticize their peers, and most of them are fooled when they see a four-star or five-star rating.