Website of the State Patent Office-Patent Search Query-Patent Query-Select the content you want to query, and you can query it. In addition, you don't need to enter ZL when querying. For some items, you don't need to enter "."in the patent number, such as
ZL2008 10075574。 X, you only need to enter 2008 10075574X, and some of them need to be marked with "."so that you can read the prompt.