From a young age, Qi Zhiyong's daughter asked him how he lost his leg.
To everyone else in the world, Qi always responded to the question with an unflinching, often angry, answer: He lost his left leg when soldiers fired on him and other unarmed civilians during protests at Tiananmen Square in one of modern history's most brutal crackdowns.
But when his daughter asked, Qi choked back the words.
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