Why do some people aspire to retire at 40?

Retirement is what everyone yearns for, especially when people reach middle age and are physically and mentally exhausted in the interlayer of the old and the young. People of this age are also in an awkward position at work. It is difficult for them to get promoted when they are old, and they lack the enthusiasm of young people when they want to do something big. So they yearn for early retirement and can do what they want when they have time!