How long can the filial piety fund return to its original capital?

After retiring at the age of 65. The filial piety fund is donated voluntarily by dutiful sons, enterprises, non-governmental organizations and people from all walks of life. , used to support subsidies for poor households over 60 in rural areas. According to official website's inquiry, they will not be returned until they retire at the age of 65, and there will be no interruption before the return. Once it is broken, all kinds of troubles will appear.