Since the nationwide implementation of two-child policy in 2016, policy-caused only-child loss is now part of the history. But the problem of only-child loss, particularly the predicament that the family has to face cannot be solved during a short period of time. The parents' need for economic support, spiritual consolation, daily care and medical treatment security gradually increases as they are getting old. However, the present service pattern based on government pension, institutional support and social organization support is hard to meet...