Can the joining fee of Happy Sweet Potato be refunded?

Can't go back. Happy sweet potato originated in Xiamen, Fujian Province, and is a brand of Xiamen Happy Sweet Potato Co., Ltd. Happy sweet potato specializes in the research and development and sales of sweet potato, tea and light food, and integrates tea with sweet potato. Committed to tea merchants, with nearly 2,000 stores, it has become a large-scale catering chain enterprise across China and Southeast Asia. After joining, an agreement will be signed, and the joining fee will not be refunded after signing.