The reason for the rise is that prolonging life is the common expectation of mankind. Square dance provides the most convenient (like gourd painting gourd ladle), economical (free) and suitable (suitable for all ages) platform for this expectation. The atmosphere of square dance is relaxed, the dancers are free, come and go freely, and grasp it by themselves. Its simplicity (easy to learn), inclusiveness (no one laughs at you if you jump wrong again) and integration (no entry threshold) do not damage its image at all, but are icing on the cake.
Square dance is a form of mass gathering, which makes people have extensive communication, and it is this kind of communication that effectively spreads all kinds of information, from astronomy and geography to vegetables and carrots. Some international and domestic current affairs news, some scientific fitness tips, some effective dietotherapy and medicated diet are all talked about by people. Square dance has realized the dancers' desire to communicate with others, so that they can make friends there, gain friendship, accept science and increase their knowledge. This is another factor of its prosperity.
To sum up, the key to the popularity of square dance is that it satisfies the material and spiritual needs of the public to the greatest extent. What is suitable is the best, which is the interpretation of its prosperity.