What is square free dance, can you briefly introduce?

Baidu search, there are video tutorials. The square dance is generally a collective activity of the old and middle-aged leisure and fitness, on a certain age, the intensity of the movement is not enough, so there is this type of leisure activities. If you are still very young, it is best not to go to dance, as the saying goes, "Nearly Zhu Zhi Chi, near the ink is black"

.