Ruan Wensheng, president of Taishan Swimming Association, said that swimming must go to a regular swimming pool with lifeguards, and the coaches who teach swimming must be qualified. In fact, learning to swim is a gradual process. It doesn't mean that every student can learn it in 10 days. Learning to swim is actually the same as learning. Doesn't mean you can get full marks once. Parents and students should be calm. Parents don't have to worry too much, and learning to swim can't be rushed. It must be done step by step.