The patent is open, but it is protected. It means: let this patent be learned by people in this industry, let this industry compete healthily and learn from each other, and you will not stop there and be satisfied with a patent without continuing research and development. At the same time, open patents can also bring you commercial advantages, let the outside world know that you have this technology and can attract investment. Moreover, you can charge others for unauthorized use of your patent. Wait a minute.