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2. Data of Food China website. A comprehensive interpretation of dining! The White Paper on the ecology of China’s Catering Industry in 2022 was officially released (2022). http://food.china.com.cn/2022-08/12/content_78369879.htm
3. Data of 21jingji website. “China’s Catering Consumption Trend in 2023” released: China’s catering consumption K-shaped differentiation is obvious (2023). https://www.21jingji.com/article/20230522/herald/c77090f5ad53899c56eab784166cad99.html
4. Data of China Cuisine Association. Novel Coronavirus Pneumonia Epidemic Situation and Development Trend Analysis Report 2020 China (2020). http://www.ccas.com.cn/site/content/204393.html
5. Zhang, C., Jiang, J., Jin, H., Chen, T.: The impact of COVID-19 on consumers’ psychological behavior based on data mining for online user comments in the catering industry in China. Int. J. Environ. Res. Public Health 18(8), 4178 (2021)