Does Yongningbao Solitaire have to be guaranteed if it takes over at school?

No. Participation in insurance is a voluntary principle. If the choice is wrong, just tell the teacher and cancel. "Tianyi Yongning Insurance" provides medical security for the insured, including self-funded medical expenses for hospitalization and special disease clinics, self-funded drugs for cancer prescriptions, drugs for specific rare diseases and proton heavy ion medical expenses.