Photo taken on July 23, 2015 shows the scene at a briefing on Potsdam Proclamation in Beijing, capital of China. A briefing on Potsdam Proclamation was held at the State Council Information Office of the People's Republic of China in Beijing on Thursday afternoon. China, the United States and Britain declared the Potsdam Proclamation on July 26 in 1945, urging Japan to surrender and demanding it follow the Cairo Declaration published in 1943. The two documents constitute the cornerstone of the post-war international order. (Xinhua/Chen Yehua)