People work at the construction site of an ethnic middle school in Yushu Tibetan Autonomous Prefecture of northwest China's Qinghai Province, Aug. 9, 2011. A total of 798 rebuilding projects will be carried out this year in Yushu, with the investment reaching 20 billion yuan (about 3.1 billion U.S. dollars). By the end of July, 413 projects have been launched. A 7.1-magnitude earthquake hit Yushu on April 14, 2010. [Xinhua/Wu Guangyu]