A senior citizen plays diabolo by the Xihu Lake in Hangzhou, capital of East China's Zhejiang province, Oct 15, 2010.Statistics from Hangzhou's health department show that the life expectancy of the city's residents in 2009 reached 80.26, and was up to the level of developed countries. The life expectancy was 77.98 for male residents and 82.76 for female residents. [Photo/Xinhua]