The police can be called to deal with the situation. Because the square dance itself is not illegal, but if the noise created by the neighboring people caused by the normal life of the rest of the infringement, then it constitutes a violation of the law.
According to the "Chinese people's *** and the State Environmental Noise Pollution Prevention and Control Law" Article 45 prohibits any unit or individual in the urban area of noise-sensitive construction of the concentration of the use of high-pitched broadcasting loudspeakers.
In urban areas of the city streets, squares, parks and other public **** place to organize entertainment, assembly and other activities, the use of audio equipment may produce interference with the surrounding living environment of excessive volume, must comply with the provisions of the local public security organs.
Article 46 When using household appliances, musical instruments or conducting other family indoor recreational activities, the volume shall be controlled or other effective measures shall be taken to avoid environmental noise pollution to the surrounding residents.
Expanded Information
Penalties for Square Dance Noise Nuisance
According to Article 61 of the Law of the People's Republic of China on the Prevention and Control of Environmental Noise Pollution, units and individuals harmed by environmental noise pollution shall have the right to demand that the victim exclude the harm; and if they cause damage, they shall be compensated for the loss in accordance with law.
Disputes over the liability for compensation and the amount of compensation may, at the request of the parties concerned, be dealt with through mediation by the competent administrative department of environmental protection or other supervisory and management departments or organizations concerned with the prevention and control of environmental noise pollution; where mediation fails, the parties concerned may sue in the people's court. The parties may also directly to the people's court.
Baidu Encyclopedia - Chinese People's *** and State Environmental Noise Pollution Prevention and Control Law