About the Authors
- Ming Li
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Roles Conceptualization, Data curation, Investigation, Project administration, Validation, Writing – original draft
Affiliation National Intellectual Property Administration, Beijing City, China
- Hui Li
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Roles Data curation, Investigation, Validation, Writing – original draft
* E-mail: 871689022@qq.com
Affiliation National Intellectual Property Administration, Beijing City, China
Competing Interests
The authors have declared that no competing interests exist.