Ahn Cheol-soo ( Hangul : 안철수 ( an tɕʰʌlsʰu ) ; born February 26 , 1962 ) , also known as Charles Ahn , is a South Korean businessman , politician , and former physician and professor .
Ahn Cheol-soo ( born February 26 , 1962 ) is a Korean businessman , doctor and professor .