1, China National Intellectual Property Administration website: Kexian's patent number was issued by China National Intellectual Property Administration. You can check on China National Intellectual Property Administration's website and search for the patent number on the website to see if there is this patent and its details.
2. Patent search websites: Some domestic patent search websites can check the authenticity of patent numbers, such as China Patent Network and Intellectual Property Star. , and search the patent number of Kexian on the website to see if the patent exists and the details of the patent.