1, the public awareness of the trademark.
2. Duration of trademark use.
3. The duration, degree and geographical scope of any publicity work on trademarks.
4, the trademark as a record of well-known trademark protection.
5. Other factors that make the trademark famous.
Extended data:
There are three ways to apply for the recognition of well-known trademarks in China:
1. Apply to the industrial and commercial bureau where the infringement case is located, and submit it to the Beijing General Administration of Trademarks for evaluation step by step.
2. During the announcement period of discovering another person's registered trademark, directly apply to the Beijing General Administration of Trademarks for trademark objection, and propose that it be recognized as a well-known trademark in China.
3. In the case of trademark invalidation, directly appeal to the members of the Trademark Review and Adjudication Board of the General Administration of Trademarks.
Baidu Encyclopedia-People's Republic of China (PRC) Trademark Law
Baidu Encyclopedia-Provisions on the Recognition and Protection of Well-known Trademarks