BEIJING (AP) — A Chinese university has built the world’s fastest supercomputer, almost doubling the speed of the U.S. machine that previously claimed the top spot and underlining China’s rise as a science and technology powerhouse.

The semiannual TOP500 listing of the world’s fastest supercomputers released Monday says the Tianhe-2 developed by the National University of Defense Technology in central China’s Changsha city is capable of sustained computing of 33.86 petaflops per second. That’s the equivalent of 33,860 trillion calculations per second.