Students at Sun Yat-Sen University in Guangzhou, China started a campaign to free Cheng Guangcheng, a blind human rights activist under "soft detention". Since any form of protest is not allowed in China, the students are posting photographs of themselves on the web.
Chen Guangcheng's story can be found here. My previous diary has some background info on the protest.
Here are two of the student photos. The Chinese characters say "must have light, must have honesty" (the Chinese name Guangcheng means "light and honesty").