http://afe.easia.columbia.edu/tps/1950.htm#communes
I have used this website before to work on pre-1800 east Asian curriculum, but I am now in love with it for it's content on 20th and 21st century information. I am fascinated with the Great Leap Forward and the Cultural Revolution, and this site has wonderful primary sources, videos, and timelines to help supplement the information. My book does a great job of explaining China's civil war and Mao Zedong and Chiang Kai-shek, but my book does not cover any of the later Mao reforms. So this website is wonderful!