The deputies of the Central People's Government signing the Treaty of Libration of Tibet. Front row right to left: Li Weihan, Zhang Jingwu, Zhang Guohua, Sun Zhiyuan. Back row left to right: Thuptan Tenthar, Sonam Wangdu, Ngapoi Ngawang Jigme, Chen Yun, Zhu De, Li Jishen.