Community home care: refers to the family as the core, community-based, to provide professional and social services to the elderly living at home, in order to solve various practical difficulties in daily life. Which of the following belong to community home care? ['Since living in the old-age care home last year, Uncle Wen has gained a total of 5 pounds. There is not only a good life there, but also more than 20 elderly people in the surrounding community as companions. He is even reluctant to go home during the Chinese New Year.', 'A community united with an elderly enterprise to launch a suitable aging transformation project: rationally adjust the living facilities of the bedroom, balcony, bathroom, kitchen, etc. of the home based on the physiological characteristics and living habits of the elderly. Last year alone, more than 600 families have completed the renovation work.', 'Mother-in-law Zhou who has retired for many years goes to a community care service center to learn folk dance with a professional teacher every morning, and then goes there as a volunteer in the afternoon, before returning home in the evening. The center will also send full-time staff to visit her regularly for medical examinations and other services.', 'An elderly community in the south provided an online booking source of housing and pick-up and drop-off service for "migration bird elderly" ready to spend the winter in this community through the "Internet + community + service" model, and arranged travel, entertainment, and social life throughout the process.']