epa03170472 A man uses a smart phone as he sits on a tomb during the Qingming Festival at the Pok Fu Lam Cemetery in Hong Kong, China, 4 April 2012. Qingming Festival, also known as Tomb Sweeping Day, is the traditional day when Chinese people visit the graves or burial grounds of their ancestors and has been regularly observed as a statutory public holiday in Hong Kong. Tomb sweeping is regarded as the most important custom in the Qingming Festival. EPA/JEROME FAVRE