A working staff demonstrates a set of commemorative stamps marking the coming G20 Hangzhou Summit in Hangzhou, capital of east China’s Zhejiang province, Aug 24, 2016. China Post will issue a special stamp set for the G20 Hangzhou Summit on Aug 27. [Photo/Xinhua]

Photo taken on Aug 24, 2016 shows a set of commemorative stamps marking the coming G20 Hangzhou Summit in Hangzhou, capital of east China’s Zhejiang province. China Post will issue a special stamp set for the G20 Hangzhou Summit on Aug 27. [Photo/Xinhua]