The miniaturization of Chinese families has caused the inadequacy of the family's elderly care function, so social services must be provided to support elderly care. To this end, the government will actively promote home care services and encourage social groups and enterprises to provide home care services. It is also necessary to actively promote the use of network resources to establish a hotline for elderly services, help systems and rescue systems for elderly services. That is to say, it is necessary to establish a "nursing home without walls". The text "the nursing home without walls" refers to:. ['Multi-participated social home care system.', 'Public welfare pension system provided by the government.', 'Home-based nursing home.', 'Nursing home based on network-based open resource sharing.']