Shi Zhiping (L) gives directions for tourists at the West Lake in Hangzhou, capital of east China's Zhejiang Province, Aug. 29, 2016. Shi, 64, has been a volunteer at the West Lake since his retirement in 2012. He received professional trainings on etiquette, foreign languages and emergency medical aid before the G20 summit, to be held in Hangzhou on Sept. 4-5. There are 1.56 million registered volunteers in Hangzhou. (Xinhua/Yin Dongxun)?