I think this time is still reasonable, most of the square dancers have gone home at 9:00 p.m. This time limit is just to tell people that square dancing should also be in moderation and not affect other people's rest.
One, the time before nine o'clock is perfectly adequate.Most of those who have time to go square dancing are retired people, and there are also some middle-aged women who clean up their chores at the end of the night after work and then go downstairs to the park to square dance with others. People square dance is to relax their mood, but also in order to exercise their own body, square dance mostly from seven o'clock in the evening on the start, to nine o'clock two hours of time can be completely active, but also let these people feel the happiness of square dance. So I think two hours of square dance time is completely enough, because dancing square dance is also a physical activity, in just learning, but also feel very tired, two hours of exercise every day, has met the requirements of many people themselves every day of the movement.
Second, this time limit, but also to avoid affecting other people's rest.While most of the square dances are on the street or in the park, but there will be residents living around them, and among these residents there may be elderly people and children, who may have to start resting after nine o'clock in the evening, so the square dance, if it continues to be performed after nine o'clock, will also affect other people's normal rest. Especially after nine o'clock in the evening, many high school students after the evening class to go home to continue to study, if the square dance continues downstairs, it will certainly affect the learning state of these children, so I think the decision is correct.
It only stipulates that square dancing is not allowed after nine o'clock, it does not stipulate the starting time, so with this regulation, people can adjust the time of square dancing every day according to their own time. This provision is also to ensure that everyone every day of rest, but also does not affect the state of these square dancers.