Most of the time, the elderly in China do not live with their children, and because of the limitation of educational level and social conditions, they usually can't find a suitable way to kill time. Old people in China like to talk about ways to keep healthy. Walking after dinner helps digestion. Dancing in the square is very helpful for killing time, talking with friends and burning energy.
Of course, when they play loud music, it is really noisy, and it is very difficult for China children who have to study late at night.