Lu Yutong (2nd L), chief designer of China's Tianhe-2 supercomputer, attends the supercomputers awarding ceremony in New Orleans, the United States, on Nov.18, 2014. For the fourth consecutive time, Tianhe-2, developed by China's National University of Defense Technology, has retained the top spot as the world's fastest supercomputer, according to a biannual Top500 list of supercomputers released here on Monday. (Xinhua/Yang Lei)