Advanced search is used in the "Patent Search" module of the websites of People's Republic of China and China National Intellectual Property Administration.

the search is more accurate. The patent retrieval module of the websites of People's Republic of China and China National Intellectual Property Administration provides different retrieval methods, among which advanced retrieval can find the patent information you need more accurately. China National Intellectual Property Administration website provides the national patent query service, and users can query by inputting information such as patent name, classification number, applicant and public number.