Behind Sun Yat-sen a.o.: Yuan Shikai, Lu Xun, Song Jiaoren, Zhou Enlai, Mao Zedong, Li Dazhao, Chen Duxiu, Qu Qiubai, Feng Yuxiang, Duan Qirui, Liao Zhongkai, Li Yuanhong, Cai E, Zhang Zuoling, Zhou Fohai, Yun Daiying, Zhang Xueliang, Fang Zhimin, Liu Zhidan, Wang Jingwei, Cai Hesen, Deng Zhongxia, Hu Shi, Cai Yuanpei, Wu Peifu, Zhang Guotao. Background: flag of China during the Republican era.