There are many similarities between the formation process of stubborn stones and the experience of life. They are all polished and precipitated over the years. They slowly become introverted and unobtrusive, gentle and not weak. They all interpret the true nature of life with a hard texture.
The design of this elderly machine is exactly this moral.
The appearance design of the whole machine is simple and true.
The back design with a stone-like texture gives the elderly simple and sincere care in perception and ergonomics.