BEIJING: China 's supercomputer Tianhe-1 which was shut down after massive warehouse explosions rocked Tianjin city last week is being restarted, official media reported today.The storage and communication of the computer has been completely restored.The computing power is gradually restarting, the China Youth Daily reported.Tianhe-1 supercomputer, located at the National Supercomputing Center in Tianjin, is one the fastest computers and one of the few petascale supercomputers in the world.Tianhe-1 provides data services to more than 300 organisations across China, including several universities and banks. It was developed by the Changsha-based National University of Defence Technology in 2009, and China thus became the world's second country capable of developing petaflop supercomputers after the United States.It could handle 1000 trillion floating point operations per second.