Legal analysis: (1) The public's awareness of the trademark;

(2) the duration of the use of the trademark;

(3) the duration, degree and geographical scope of any publicity work of the trademark;

(4) the record that the trademark is protected as a well-known trademark;

(5) Other factors that make the trademark well-known.

legal basis: article 14 of the trademark law of the people's Republic of China shall, at the request of the parties concerned, identify a well-known trademark as a fact that needs to be identified in handling trademark cases. The following factors should be considered when identifying a well-known trademark:

(1) the awareness of the trademark by the relevant public;

(2) the duration of the use of the trademark;

(3) the duration, degree and geographical scope of any publicity work of the trademark;

(4) the record that the trademark is protected as a well-known trademark;

(5) Other factors that make the trademark well-known.