Population ageing has become a prominent social problem in the world today. With the increasing in the number of retired people, the extension of human life, and fewer children, there are two serious problems, such as the shortage of labour and a growing number of elderly people who need care from young people. We need a movement machine serve as a supplement to the infirm and the elderly, for helping these people improve their self-care ability and improve their quality of life.% 人口老龄化已成为当今世界的一个突出的社会问题。退休人口数量增加、人类寿命延长及少子化趋势加速、社会有两个严重问题是劳动力的匮乏和越来越多的老年人需要年轻人来照顾，我们需要一种机器用以辅助体弱者及中老年人运动，来帮助这部分人提高他们的自理能力和改善他们的生活质量。
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