The main purpose of doing a Ph.D. is mainly because you have a research interest or problem which you deeply believe your contribution in research can form a better world. It is never too late to start a Ph.D. at the age of 80 or 90 years old; according to latest technology, one can grow up to 200 years old.

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I'm Hui-Shin Wong, Wong Hui Shin or Shyan H. Wong.