National chain refers to organizations that handle various business procedures according to law, have branches or chain stores of a certain scale, and expand to major cities across the country. Congyiyuan Health Center is only distributed in Guangdong Province, and there are Congyiyuan Health Centers in Shantou City and Shenzhen City. As of June 20, 2023, the health center has not been distributed to other provinces and cities, so Congyiyuan Health Center is not a national chain.