Guo Yushan, a Beijing-based researcher and rights activist, handout photo taken September 11, 2011. REUTERS/Handout/Files

Guo Yushan, a Beijing-based researcher and rights activist, handout photo taken September 11, 2011. REUTERS/Handout/Files

Guo Yushan, a Beijing-based researcher and rights activist, handout photo taken September 11, 2011. REUTERS/Handout/Files

September 15, 2015 7:17 AM (UTC+8)