If you want to check the duplicate, you can refer to the following website: 1. Official website of the patent office: <strong></strong> If there are identical or similar patents, you can check the application status and content of the patent to find out if there is a possibility of violating other people's patents. 2. patent search platform: such as PingWest, Patents Home, etc. These platforms provided various patent search functions that could search for identical or similar patents based on keywords, applicants, inventor, and other information. On the search results page, you could see the detailed information of each patent, including the patent number, application time, invention content, claims, and so on. If you think that a patent is at risk of being violated, you can check the patent status on the platform to see if the patent has been granted by the patent office. It should be noted that the scope of patent protection is the invention itself, not the content or implementation of the invention. Therefore, when writing a patent, one needed to ensure that their invention was unique, effective, and practical.