The principle of the music relaxing chair is to massage by using the mechanical rolling force and mechanical force extrusion.

Musical chair:

Musical chair, as Hong Kong people call it, is a kind of group game. The game is to place a chair less than the participants on the ground. After the music started, the participants circled around the chair, and then the music suddenly stopped. Participants should sit in chairs as soon as possible. Those who can't get a seat at the latest are eliminated. After that, reduce a chair and continue the game until a winner is obtained.