According to Demographic Transition Model, there has been a gradually shift from high fertility and mortality rates to a decline in birth rate and death rates, which leads to the ageing of populations in the world. Therefore, many scientists, developmental psychologists, healthcare professionals and even governments start to emphasis on the aging issue. In the previous years, ageing was simply associated with a decline in physical, psychological, social capacities and an increase in the risk of frailty, disability, morbidity. For instance, Dana Kotter-Gruehn, a psychology professor, said that even children have these negative streotypes about growing older and they see older adults as sick, slow, forgetful and no good. However, in recent years, the views of ageing have changed.…