Legal analysis: Dance belongs to non-profit fitness activities. When accidents, sudden climate change, acute diseases and other unexpected factors cause physical injuries, the sponsors and colleagues of the team have the obligation to try their best to help, but if irreversible injuries are caused, other members of the team will not bear any responsibility. Any team member should participate in the activity on the principle of "trying to rescue at his own risk", and the initiator and organizer of the activity will not bear any legal and economic responsibilities.

Legal basis: Article 469 of the Civil Code of People's Republic of China (PRC), the parties may conclude a contract in written form, orally or in other forms.

Written form refers to contracts, letters, telegrams, telexes, faxes and other forms that can tangibly express the contents contained.

A data message that can tangibly express its content through electronic data interchange, e-mail, etc. , and can be retrieved at any time, are considered in writing.