First, the safety awareness of training courses is not enough, and managers should strengthen management and improve safety awareness. I don't know whether it's the opinion of the training class or the teacher's idea, but there are obviously security risks, so the management and teachers of the training class have unshirkable responsibilities.
Second, I saw the pictures of the class on the Internet, and even some parents watched as bystanders, without stopping. Perhaps out of the need to save the cost of class, children have skating lessons in such venues. Parents may also feel that they will always accompany the class and there will be no danger. And everyone is studying in it, not surprisingly. Everyone has this kind of luck, thinking that not seeing someone who has an accident means that it will not happen, but we must know that once such an accident happens, it will be unbearable pain for us.
Thirdly, this behavior of taking children to class on the frozen river may also leave an impression on children's consciousness. They think that this kind of river skating is not dangerous. Children sometimes don't have that strong resolution. This time, accompanied by their parents and coaches, they felt safe skating on the river. Next time, they may only dare to go to the ice when they have little friends to play with. Without parents present, if something goes wrong, other small partners can do nothing. Imagine the terrible consequences, so we still can't be careless.