Hong Kong (CNN)When Ho Feng Shan died at the age of 96, he took a secret to his grave. The only clue was a single sentence in his obituary in 1997.
Throughout his long life, Ho never mentioned his heroic deeds during World War II — not to his wife, his children or friends.
During 1938 to 1940, Ho, the consul general of the then Nationalist Chinese government's embassy in Vienna, saved perhaps tens of thousands of Jews from the Holocaust with just a stroke of his pen.