秦城监狱
Yan was a student leader during the Tiananmen Square protests of 1989. At one point, he called himself "general commander". After the crackdown at Tiananmen Square, he was placed on China's most wanted list. Captured in late June 1989 at Datong, he was returned to Beijing under armed guard of hundreds of soldiers. Afterwards, he was detained for 19 months at Qincheng Prison without being charged with a crime.