1. Log on to China National Intellectual Property Administration website or China Patent Network. (When looking for official website, Baidu will be followed by the word official website. )
2. Click "Advanced Search" in the patent search section.
Type the key words you know, such as patent number or patent name, and then click the red search button.
4. Obtain all relevant patent search tables and select a patent to enter the specific webpage of the patent.
If you can't find the patent-related information, it is probably caused by recent patent registration, undisclosed information in official website and other factors.