How people retire at 50?

      I remember that our writing teacher had post a topic about  "people retire at 50" last week.When i was back my dorm,I carefully consider this question.

      MANY people would love the opportunity to retire early and swap the nine-to-five grind for a stress-free life of traveling,playing,and eating,especially for the older generation.

     As far as i am concerned, unless we are lucky enough to win the lottery or inherit a fortune, early retirement looks like little more than a pipe dream for all but the lucky guys. With a little hard work and some serious saving,  would it be easy to gather enough money to retire at 50? I don't think so.

      So,what's your views towards this question?How people retire early at 50?