How to determine the jurisdiction of intellectual property infringement litigation with the seller as the co-defendant

According to the Supreme People's Court's regulations on judicial interpretation of patents, trademarks and copyrights, if the plaintiff sues others for infringement of their patents, trademarks or copyrights, if both producers and sellers are sued, they shall be under the jurisdiction of the courts at the place where the producers and sellers live and act, provided that they meet the hierarchical jurisdiction and centralized jurisdiction designated by the Supreme Court. If only one defendant is prosecuted, it shall be under the jurisdiction of the people's court of the defendant's domicile or behavior. However, in a product patent infringement lawsuit, if the plaintiff only files a lawsuit against the producer of the infringing product and does not file a lawsuit against the seller, and the place of production of the infringing product is different from the place of sale, it shall be under the jurisdiction of the people's court of the place of production. Only when the seller is a branch of the manufacturer and the plaintiff sues the manufacturer of infringing products for manufacturing and selling at the place of sale, the people's court at the place of sale has jurisdiction. It should be said that the provisions of judicial interpretation are relatively clear, which plays an important role in determining the jurisdiction court of intellectual property infringement disputes. However, in recent years, in judicial practice, there are some new problems in how to determine the jurisdiction court of intellectual property infringement litigation with the seller as the co-defendant, which deserve further study.