Trademark Office official website: 9080/tmois/wscxsy_getIndex.xhtml After entering, click on the second trademark approximate query and enter the international classification category according to the specific product you want to register. For example, clothing is category 25. If If you registered pure Chinese characters, select Chinese character query, then enter the name you want to query and enter the verification code. However, the official website of the Trademark Office sometimes cannot be opened on weekends.