Why can't I find the patent number in China National Intellectual Property Administration?

You can try zai to query. It is better to master a query method for life than to teach people a fish. The method is as follows: 1. Log on to China National Intellectual Property Administration website or China Patent Network (address is Baidu). 2. Click "Advanced Search" in the patent search section on the right. Enter the key words you know, such as patent number or patent name, and click the red search button. Select a patent and enter the specific title page of the patent. 5. If you are prompted to install the plug-in, install it as required, otherwise you will not be able to browse the manual. 6. Click the manual button at the bottom of the patent number to enter the manual page, where you can browse the specific content. 7. Click the Save button on the top line to select the download path, and then select OK to download successfully.