I. Introduction
The incidence rate of the stroke has increased continuously in recent years [1]. Stroke is a leading reason of the disabilities, which always leads to the impairment of upper limb and disabilities of performing activities of daily living (ADLs) [2]. After the outbreak of this disease, it is extremely important for those patients to perform rehabilitation training timely and intensively. However, due to the limitation of therapists and medical resources, many stroke patients cannot acquire professional and effective rehabilitation training.