Three to six months. Provide 1+X professional training system for nursing service providers, in which 1 stands for basic training courses, including the training of professional skills such as aged care, daily care, mental health and life rescue, and X stands for a variety of extended training courses, including the study of nursing management, special care and operation management, so as to improve the professional level and comprehensive quality of nursing service providers. The training duration is generally 3 to 6 months, depending on the training institution. The training duration of nursing for the aged 1+x refers to a vocational training plan for nursing staff for the aged in the construction of China's old-age service system.