According to (Tianyancha) query, Yishanfang Group is a food company established in Linyi High-tech Zone, which was established in March 20 14. The company is committed to providing healthy catering services, including food production, sales and distribution. Yishanfang Group has many stores and branches in Linyi City, providing various healthy foods and catering services for local residents. So far, it has not been extended to other cities or regions. What can be confirmed is that the catering room is currently only operated in Linyi City, and there are no stores or branches in other areas for the time being.