A man detained by Chinese authorities without trial for two years has launched what supporters say is a risky hunger strike to protest his ongoing incarceration. Radio Free Asia reports that Yu Shiwen has begun refusing food and plans to go without eating for one month leading up to June 4, which this year will be the 27th anniversary of the day Chinese security forces opened fire on peaceful pro-democracy protesters in the center of Beijing. Yu was caught up in a May 2014 crackdown against those planning to mark the quarter-century anniversary of the massacre.