Sendai should be on the static side, not on the dynamic side, and it should not be placed on or next to the furniture that is always open. It is not suitable to put TV sets, stereos, video players, telephones and other items with frequent sounds in Sendai, let alone beside refrigerators and washing machines. Don't play cards, eat, make noise, frolic or behave impolitely near Sendai. The placement of Sendai must be firm and stable, and don't swing from side to side with a slight collision.