Where is the legal boundary of the deep synthesis algorithm that makes people change from second to second? As long as you download a certain software, you can easily cast your facial features on the original actors' faces and enjoy the pleasure of "participating in" movies, TV plays and short videos. In recent years, "AI Face Changing" has become popular on the Internet. No matter in the mobile app store, social platform or short video platform, many apps and applets that provide "AI Face Changing" service can be seen. Just upload a photo and process it with an in-depth synthesis algorithm to change the video hero in seconds. However, there are many legal risks and infringement disputes hidden behind the interest of "AI face changing". Recently, the Hangzhou Internet Court heard a case of infringement of others' portrait right by "AI Face Changing" App using depth synthesis algorithm, and determined that the app developer constituted an infringement of the plaintiff's portrait right. Where is the legal boundary of "AI face changing" technology? What are the legal risks of developers providing "AI Face Changing" services and users making and uploading "AI Face Changing" videos? With these questions in mind, the reporter of the Rule of Law Daily interviewed relevant insiders. There are a large number of similar software that can easily change their faces with one click. In this case heard by the Hangzhou Internet Court, the plaintiff Lou is a model of ancient Chinese clothing, and often publishes photos and videos of ancient Chinese clothing on social platforms. Mr. Lou found that the "AI Face Changing" app operated by the defendant company used the antique modeling video template he shot. The user can replace the face in the video template with the face uploaded by the user by uploading personal photos. Except for substantial changes in facial features, the rest of the content is consistent with the original video. The software generates the ancient style modeling video after face changing, which users can save and share to other platforms. The court held that the defendant company, without the consent of Lou, used the depth synthesis technology to make a forged video with his portrait, which should be recognized as an infringement of Lou's portrait right according to law. The court ruled that the defendant apologized to Lou and compensated 5000 yuan for the loss. According to the definition given in the Regulations on the Management of Internet Information Service Deep Synthesis, deep synthesis technology refers to the technology that uses deep learning, virtual reality and other synthetic algorithms to produce text, image, audio, video, virtual scene and other network information. It includes face generation, face replacement, character attribute editing, face manipulation, pose manipulation and other technologies for generating or editing biometrics in images and video content; Image generation, image enhancement, image repair and other technologies for generating or editing non biological features in images and video content. The reporter found that there are a large number of "AI Face Changing" apps and applets using this technology. In the mobile app store, search for keywords such as "AI Face Changing", and many related apps are recommended, such as "AI Video Face Changing Show", "One Touch Face Changing", "Face Changing Treasure", and "Yanji". Search "Face Changing" on a social platform, and you can also see many "AI Face Changing" applets, such as "AI Face Changing" and "Face Changing AI". The reporter downloaded the most popular "AI Video Face Changing Show" app in the mobile application store. The app has several face changing templates to choose from, including AI