Where can I retrieve patent information? How to search?

1. Log on to China National Intellectual Property Administration website or China Intellectual Property Network (the address can be Baidu, or you can directly click on the friendly link at the bottom of this website). 2. Click "Advanced Search" in the patent search section on the right. 3. Enter the keywords you know, and click the red search button. If you know the names of the inventor, applicant and obligee of the patent or the name of the patent, you can fill in any keywords. You can query the published patents, and you can get the patent number and specific content by entering the specific page. Of course, if you already know the patent number, you can also use the patent number as a keyword to search for a patent, otherwise you can get other information. 4. Get all relevant patent search tables, select a patent and enter the specific title page of the patent. 5. If you are prompted to install the plug-in, you cannot install it as required. 6. Click the Description button at the bottom of the patent number to enter the description page, where you can browse the specific content. 7. Click the Save button on the top line to select the download path.