Acknowledgement
This research was supported by: Research on cultural evaluation and Protection Development Countermeasures in ethnic minority areas based on big data. China Ethnic Affair Commission Research Programe,2020-GMD-089. A communication research of Beijing image in overseas social media. Beijing Social Science Foundation,19JDXCA005. National Natural Science Foundation of China- A Placeality-Based View of Destination Brand DNA Selection(Grant no: 71673015).
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