Caregiving training group will receive an evidence-based caregiving training via manual during nurse home visit.

Caregiving training plus family resilience group will receive an evidence-based caregiving training and family resilience psychological intervention via manual during nurse home visit

Controlled group will receive usual community service by nurse.

This is designed based on evidence of daily living activity ability caregiving, including① Dietary training: guiding caregivers to choose appropriate tableware according to the functional status of disabled elderly people, and training them in eating posture such as changing positions and using tableware; ② Dressing training: guide caregivers to train disabled elderly people on how to put on and take off clothes, shoes, socks, etc.; ③ Personal hygiene training: including washing face, hands, brushing teeth, etc.; ④ Excretion function training: including urination function training and defecation function training; ⑤ Mobile training: including support walking training, cane walking training, etc.; ⑥ Wheelchair training: Guide caregivers to use wheelchairs according to the specific situation of disabled elderly people.

The Walsh Family Resilience Questionnaire Chinese Version (WFRQ-C) is used to measure the level of family resilience of primary caregivers. The questionnaire includes three dimensions and 26 items: family beliefs, communication and resolution, and external support. The questionnaire items are evaluated using a Likert 5-point rating system, with scores ranging from 1 to 5 from "never" to "always". The higher the score, the higher the level of family resilience. The Cronbach's alpha coefficient of the questionnaire is 0.93, with a test-retest reliability of 0.96, indicating good validity.

Distress thermometer (DT): used to assess the level of psychological distress of primary caregivers. This scale was designed by Roth and translated into China by Tang Lili et al. in 2011. DT is a visual analog scale scale ranging from 0 to 10 points (0 indicates no psychological distress, 10 indicates extreme psychological distress). The reliability of the Chinese version DT retest is r=0.80, and the calibration validity is good.

Caregiver Task Inventory (FCTI): used to measure the caregiving ability of primary caregivers. This scale consists of 5 dimensions (adapting to caregiver roles, responding to needs and providing assistance, handling personal emotions, evaluating family and community resource professionals, and adjusting life to meet caregiving needs), with a total of 25 items.The total score is 50 points, with higher scores indicating more caregiving difficulties for caregivers. The Cronbach's alpha coefficient of the scale is 0.93, indicating good construct validity.

The Zarit Burden Inventory (ZBI) is used to measure the caregiving burden of primary caregivers. This scale is a self-assessment scale consisting of two dimensions: personal burden and responsibility burden, with a total of 22 items. The Cronbach's alpha coefficient of this scale is 0.87.