There is only one bed in our house, and we were forced to buy it. At that time, their staff dragged the old men and women to do free physical therapy, calling them "mom and dad" one by one. After a while, they let you buy it, or they will never talk to you again. This thing doesn't play a fundamental role, it's just superficial, it can't cure so many diseases at all, just make it comfortable when you are tired or have a backache, that is, it plays the role of massage. Besides, it is easy to break. It used to be free maintenance, but now the maintenance is not particularly high. You should think carefully!