Legal analysis: First, query through the official website of the National Trademark Office and the trademark query system;

Second, query through the trademark query system of the trademark agency registration agency.

Legal basis: "Trademark Law of the People's Republic of China"

Article 22 Applicants for trademark registration shall fill in the categories of goods for which the trademark is used according to the prescribed commodity classification table. and product name, submit an application for registration. A trademark registration applicant can apply to register the same trademark for multiple categories of goods through one application. Trademark registration applications and other relevant documents can be submitted in writing or in the form of data messages.

Article 23 If a registered trademark needs to obtain the exclusive right to use the trademark on goods beyond the approved scope of use, a separate application for registration shall be submitted.

Article 24 If a registered trademark needs to change its sign, a new registration application must be submitted.

Article 25: A trademark registration applicant files another trademark registration application for the same goods with the same trademark in China within six months from the date when the trademark registration application is first filed in a foreign country. , can enjoy priority in accordance with the agreement signed by the foreign country and China or the international treaty to which both countries are party, or in accordance with the principle of mutual recognition of priority. To claim priority in accordance with the preceding paragraph, a written statement shall be made when filing an application for trademark registration, and a copy of the first trademark registration application document shall be submitted within three months; if a written statement is not made or the trademark registration application is not submitted within the time limit, Copies of documents shall be deemed not to have claimed priority.