What does it mean that after patent infringement, merchants are not allowed to sell infringing products again or are not liable for infringement?

Infringement that does not bear the liability for damages does not mean that it does not bear any responsibility. If it constitutes such a situation, it should be stopped. 1. For the purpose of production and operation, anyone who uses or sells a patented product that is not known to be manufactured and sold without the permission of the patentee or a product directly obtained according to the patented method shall not be liable for compensation. The so-called "legal source" means that users or sellers buy from others through legal purchase channels, normal sales contracts and reasonable prices. 2. Still have to bear the legal responsibility to stop the infringement. In other words, people who sell patent infringing products in good faith may not sell them again when they know that the products they sell are infringing products, otherwise it will constitute infringement.