1, which can be used for patent inquiry in China National Intellectual Property Administration public database. You can also entrust a patent search center to make professional inquiries.

2. Analyze the types of patents to be queried. In China, there are three types of patents: invention, utility model and appearance patent. Only when the type of patent is determined can it be inquired.

3. If there is a patent number/application number, you can directly enter it in the column of patent number/application number.