A 9-year-old boy named Xiong Sansan rides on the back of his father's tricycle to collect scraps in Baisha, an urban village in Liuzhou city, South China's Guangxi Zhuang autonomous region, July 29, 2011. The boy migrated to the city eight years ago with his parents, who maintain their tough lives by collecting scraps. During the summer vacation, Xiong always goes with his friends to the building site to collect scrap irons to contribute economically to his family. Even without a wide court, cool swimming pool, various summer camps or interest-oriented classes, Xiong and his friends can still find joy. [Photo/Xinhua]

  Xiong Sansan follows his father with a bag to collect scrap irons at a building site in Liuzhou city, South China's Guangxi Zhuang autonomous region, July 29, 2011. [Photo/Xinhua]