Liu Guangming, director of China's National Supercomputer Center in Tianjin, speaks during a ceremony officially annoucing the Top 500 list, in New Orleans, Louisana, the United States, Nov. 16, 2010. Tianhe-1A, a NUDT YH Cluster System at the center, is ranked No. 1 among the 36th edition of the World's TOP 500 Supercomputers with 2.566 PFlop/s Linpack Performance. [Xinhua]