Hypertension is the highest prevalence of cardiovascular diseases in China (Chen et al., 2018). According to the latest report, there are approximately 250 million people with hypertension, with the prevalence rate of 17.9% (Fan et al., 2020). The incidence of hypertension rises as the population grows older (Hansell et al., 2017; Hypertension Branch of Chinese Association for Promotion of International Communication in Medical Care et al., 2019). China has the world's largest elderly population. According to the latest demographic data from the National Bureau of Statistics in 2019, by the end of 2018, China's ageing population aged 60 and above had reached 249 million, accounting for 17.9% of the population (National Bureau of Statistics of China, 2020). Lu et al. (2017) found that over 50% of the older people in China, who have target organ damage, experience hypertension. Therefore, it is very important for medical staff to help elderly patients with hypertension to improve self-care ability and effectively control their blood pressure.