Formal.

1. Professional team: Congyiyuan Health Management Center has a professional team with relevant health management knowledge and skills. Staff are professionally trained and certified to provide high-quality health management services.

2. Registered trademark and business license: Congyiyuan Health Management Center has registered a trademark and obtained a legal business license. It means that they are legal institutions recognized and registered by relevant departments and comply with legal and business requirements.

3. Official certification: Congyiyuan Health Management Center’s unified social credit code 92330329MABXBMCA5E can be verified through corporate inquiry. This official certification further proves legitimacy and formality.