A group photo of Chinese students who worked and studied in France, taken in 1921. [Photo/Xinhua]

Zhu De and Chinese students who studied in Germany pose for a photo in Gottingen, Germany in the beginning of September 1922. Front row (L-R): Zhu De, He Zhihua, Zheng Taipu, Zhang Shenfu; back row (R-L): Sun Bingwen and Gao Yuhan, others unknown. [Photo/General Review of the Communist Party of China]

The picture depicts some members of the New People's Study Society (Xinmin Xuehui), which was set up in Changsha in April 1918 by Mao Zedong (pictured in back row, 4th L) and Cai Hesen, among others. [Photo/Exhibition Road to Rejuvenation at the National Museum of China]