Mr. Jack Ma, the founder and chairman of Alibaba Group in China
says that in one's 20's, one must find a good boss and learn
from him; in one's 30's one must acquire skills and experience
withwhich to stand on one's own feet; in one's 40's, one must do
something by oneself using what one has learnt; in one's 50's,
one must teach young people; in one's 60's, one must take rest
for there is nothing much to do in one's 60's.