The training class is responsible. There is something wrong with the accommodation provided by the training class, and it is responsible for the poor supervision of the training class. If the injury occurs between children, the parents of the children who hurt others have a direct obligation to compensate. Events cannot be absolutely avoided. Counseling institutions should communicate with both sides of the incident: on the one hand, they should bring gifts to visit and appease the injured children and their parents; On the other hand, we should patiently communicate with the parents of children who have no intention of hurting others and try our best to coordinate and solve the problem.