Ran Yunfei (born 1965) is a Chinese writer and a high-profile democracy activist and blogger. He was arrested in late March 2011, shortly after the start of the 2011 Chinese pro-democracy protests, on charges of inciting subversion of state power. He was released in August 2011 and remains under residential surveillance. Ran expressed through social media that he converted to Christianity on October 31st, 2015. He has been attending a Bible study since 2013.
Although he became a scholarly writer of Chinese classical culture hereafter, he was increasingly active in online writing. He is a prolific writer of social and political commentary. His blog is well known in China and his Twitter account has more than 44,000 followers. Ran was also among those who signed Charter 08.