Famed philanthropist Chen Guangbiao helps to direct traffic in downtown Nanjing, capital of East China’s Jiangsu province, Sept 7, 2010. Chen took the role of traffic ambassador in Nanjing recently and advocates road safety in the city. The billionaire has pledged to donate his entire fortune of more than five billion yuan ($735 million) to charity after his death in response to Bill Gates and Warren Buffett’s call for philanthropy. [Photo/Xinhua]