Citizens enjoy a sun bath on a man-made sandy beach set up on the bank named south Waitan along the Huangpu River in Shanghai, east China, April 5, 2011, the last day of China's three-day Qingming holiday. Photo: Xinhua/Niu Yixin

Citizens enjoy a sun bath on a man-made sandy beach set up on the bank named south Waitan along the Huangpu River in Shanghai, east China, April 5, 2011, the last day of China's three-day Qingming holiday. Photo: Xinhua/Niu Yixin

Citizens enjoy a sun bath on a man-made sandy beach set up on the bank named south Waitan along the Huangpu River in Shanghai, east China, April 5, 2011, the last day of China's three-day Qingming holiday. Photo: Xinhua/Niu Yixin

Citizens play on a man-made sandy beach set up on the bank named south Waitan along the Huangpu River in Shanghai, east China, April 5, 2011, the last day of China's three-day Qingming holiday. Photo: Xinhua/Niu Yixin